diff --git a/components/contexts/GroupProvider.tsx b/components/contexts/GroupProvider.tsx
index f4c3b93..16c16c3 100644
--- a/components/contexts/GroupProvider.tsx
+++ b/components/contexts/GroupProvider.tsx
@@ -9,6 +9,7 @@ interface Props {
 
 interface GroupContextType {
   doNotSuggest: Set<string>
+  exportedFactories: Set<string>
 
   ignoredFactories: string[]
   setIgnoredFactories(factories: string[]): void
@@ -21,13 +22,14 @@ interface GroupContextType {
   removeGroup(name: string): void
   renameGroup(name: string, newName: string): void
 
-  setFactories(name: string, factories: string[], type: 'inputs'|'intermediates'|'exports'|'malls'): void
+  setFactories(name: string, factories: string[], type: 'exports'|'malls'): void
 
   getInputType(uid: string): 'base'|'produced'|'unknown'
 }
 
 const defaultValues: GroupContextType = {
   doNotSuggest: new Set(),
+  exportedFactories: new Set(),
 
   ignoredFactories: [],
   setIgnoredFactories() {},
@@ -53,7 +55,7 @@ export const GroupProvider: FC<Props> = ({children}) => {
   const [groups, setGroups] = useLocalStorage<Record<string, Group>>('serviceGroups', {})
 
   const doNotSuggest = useMemo<Set<string>>(() => {
-    return new Set([...Object.values(groups).flatMap(group => [...group.exports, ...group.malls, ...(group.malls.length ? group.intermediates : [])]), ...excludedSuggestions, ...basicValues])
+    return new Set([...Object.values(groups).flatMap(group => [...group.exports, ...group.malls]), ...excludedSuggestions, ...basicValues])
   }, [basicValues, groups, excludedSuggestions])
 
   const exportedFactories = useMemo<Set<string>>(() => {
@@ -63,7 +65,7 @@ export const GroupProvider: FC<Props> = ({children}) => {
   const addGroup = useCallback((name: string, exports: string[] = [], malls: string[] = []) => {
     if (name in groups) return false
     setGroups(groups => {
-      groups[name] = { name, inputs: [], intermediates: [], exports, malls }
+      groups[name] = { name, exports, malls }
       return groups
     })
     return true
@@ -75,6 +77,7 @@ export const GroupProvider: FC<Props> = ({children}) => {
     })
   }, [setGroups])
   const renameGroup = useCallback((name: string, newName: string) => {
+    if (name === newName) return
     setGroups(groups => {
       groups[newName] = {...groups[name], name: newName}
       delete groups[name]
@@ -96,6 +99,7 @@ export const GroupProvider: FC<Props> = ({children}) => {
 
   const value: GroupContextType = useMemo(() => ({
     doNotSuggest,
+    exportedFactories,
 
     ignoredFactories: excludedSuggestions,
     setIgnoredFactories: setExcludedSuggestions,
@@ -110,6 +114,6 @@ export const GroupProvider: FC<Props> = ({children}) => {
 
     setFactories,
     getInputType
-  }), [addGroup, basicValues, doNotSuggest, excludedSuggestions, getInputType, groups, removeGroup, renameGroup, setBasicValues, setExcludedSuggestions, setFactories])
+  }), [addGroup, basicValues, doNotSuggest, excludedSuggestions, exportedFactories, getInputType, groups, removeGroup, renameGroup, setBasicValues, setExcludedSuggestions, setFactories])
   return <GroupContext.Provider value={value}>{children}</GroupContext.Provider>
 }
diff --git a/components/home/EntitySpan/EntitySpan.module.css b/components/home/EntitySpan/EntitySpan.module.css
index c878290..bd9d543 100644
--- a/components/home/EntitySpan/EntitySpan.module.css
+++ b/components/home/EntitySpan/EntitySpan.module.css
@@ -10,6 +10,8 @@
 
 .spanSimple {
     padding-inline-start: 0.2em;
+    position: relative;
+    display: inline-block;
 }
 
 .tooltip {
@@ -19,8 +21,8 @@
     display: none;
     position: absolute;
     left: calc(100% + var(--arrow-width));
-    top: -500%;
-    bottom: -500%;
+    top: -5000%;
+    bottom: -5000%;
     margin: auto 0;
     width: max-content;
     height: max-content;
@@ -37,8 +39,8 @@
 .tooltip::before {
     content: "";
     border-style: solid;
-    top: -500%;
-    bottom: -500%;
+    top: 0;
+    bottom: 0;
     margin: auto 0;
     height: max-content;
     border-width: var(--arrow-height) var(--arrow-width) var(--arrow-height) 0;
@@ -76,6 +78,10 @@
     margin-block-start: 0;
 }
 
+.usedBy {
+    max-width: 20em;
+}
+
 .leftClick {
     height: 1em;
     transform: translateY(0.1em);
diff --git a/components/home/EntitySpan/EntitySpan.tsx b/components/home/EntitySpan/EntitySpan.tsx
index c8ce508..be443ba 100644
--- a/components/home/EntitySpan/EntitySpan.tsx
+++ b/components/home/EntitySpan/EntitySpan.tsx
@@ -1,25 +1,28 @@
 import {FC, HTMLProps, memo, useMemo} from "react"
-import {Entity} from "../../../src/types"
+import {EnrichedEntity, Entity} from "../../../src/types"
 import {useFactories} from "../../../src/hooks/useFactories"
 import styles from './EntitySpan.module.css'
 import {RecipeSpan} from "../Recipe/Recipe";
 import {LeftClickIcon} from "../LeftClickIcon/LeftClickIcon";
 import cx from 'classnames';
+import {EntityIcon} from "../EntityIcon/EntityIcon";
 
 interface Props extends Omit<HTMLProps<HTMLSpanElement>, 'value'> {
-  value: Entity|string
+  value: EnrichedEntity|string
   state?: 'base'|'produced'|'unknown'
   leftClickText?: string
   rightClickText?: string
   simpleStyle?: boolean
+  className?: string
 }
 
-const EntitySpanUnmemo: FC<Props> = ({value, state, leftClickText, rightClickText, simpleStyle, ...rest}) => {
+const EntitySpanUnmemo: FC<Props> = ({className, value, state, leftClickText, rightClickText, simpleStyle, ...rest}) => {
   const {findFactory} = useFactories()
-  const entity = useMemo<Entity>(() => {
+  const entity = useMemo<EnrichedEntity>(() => {
     return typeof value === "object"
       ? value
       : findFactory(value) ?? {
+        usedBy: [],
         href: value,
         name: value,
         image: value,
@@ -27,7 +30,7 @@ const EntitySpanUnmemo: FC<Props> = ({value, state, leftClickText, rightClickTex
       }
   }, [findFactory, value])
 
-  return <span className={simpleStyle ? styles.spanSimple : styles.span} {...rest}>
+  return <span className={cx(className, simpleStyle ? styles.spanSimple : styles.span)} {...rest}>
     {/* eslint-disable-next-line @next/next/no-img-element */}
     <img className={styles.img} src={`https://wiki.factorio.com${entity.image}`} alt={entity.name}/>
     <span className={styles[state ?? 'unknown']}>{entity.name}</span>
@@ -38,6 +41,14 @@ const EntitySpanUnmemo: FC<Props> = ({value, state, leftClickText, rightClickTex
           <RecipeSpan recipe={entity.recipe}/>
         </>
       )}
+      {entity.usedBy?.length ? (
+        <>
+          <div className={styles.strong}>Used By</div>
+          <div className={styles.usedBy}>
+            {entity.usedBy.map(used => <EntityIcon value={used} key={used.name}/>)}
+          </div>
+        </>
+      ) : null}
       {(leftClickText || rightClickText) && (
         <>
           <div className={styles.strong}>Actions</div>
diff --git a/components/home/Group/Group.module.css b/components/home/Group/Group.module.css
index 664df4c..da75cdc 100644
--- a/components/home/Group/Group.module.css
+++ b/components/home/Group/Group.module.css
@@ -1,8 +1,7 @@
 .root {
     position: relative;
     border: 2px solid black;
-    padding: 0.5em;
-    margin: 1em;
+    padding: 1em 0.5em;
 }
 
 .quit {
diff --git a/components/home/Group/Group.tsx b/components/home/Group/Group.tsx
index 1d32568..d1415cf 100644
--- a/components/home/Group/Group.tsx
+++ b/components/home/Group/Group.tsx
@@ -1,7 +1,7 @@
 import {FC, memo, useCallback, useEffect, useMemo} from "react";
 import {FactorySelect} from "../FactorySelect/FactorySelect";
 import {useFactories} from "../../../src/hooks/useFactories";
-import {Entity, Group} from "../../../src/types";
+import {EnrichedEntity, Entity, Group} from "../../../src/types";
 import styles from "./Group.module.css"
 import {EntitySpan} from "../EntitySpan/EntitySpan";
 import {useGroups} from "../../contexts/GroupProvider";
@@ -11,11 +11,13 @@ interface Props {
 }
 
 const GroupBoxBase: FC<Props> = ({ group }) => {
-  const {factories} = useFactories()
+  const {factories, findFactory} = useFactories()
   console.log("group")
   const {
     doNotSuggest,
     setFactories,
+    baseFactories,
+    exportedFactories,
     ignoredFactories,
     setIgnoredFactories,
     renameGroup,
@@ -24,42 +26,59 @@ const GroupBoxBase: FC<Props> = ({ group }) => {
   } = useGroups()
   const {
     name,
-    inputs,
-    intermediates,
     exports,
     malls
   } = group
 
-  const calculatedInputs = useMemo<string[]>(() => {
-    const allProducingFactories = [...intermediates, ...exports, ...malls]
-    const newData: string[] = factories
-      .filter(factory => allProducingFactories.includes(factory.href))
-      .flatMap(factory => Object.keys(factory.recipe?.prerequisites ?? {}))
-    const uniqueInputs = Array.from(new Set(newData))
-    return uniqueInputs
-      .filter(input => !allProducingFactories.includes(input))
-      .sort((a, b) => a.localeCompare(b))
-  }, [factories, intermediates, exports, malls])
+  const [inputs, intermediates] = useMemo<[string[], string[]]>(() => {
+    const allProducingFactories = [...exports, ...malls]
+    const prducingSet = new Set(allProducingFactories)
+    const ignored = new Set(ignoredFactories)
+    const base = new Set(baseFactories)
+    const inputs = new Set<string>()
+    const intermediates = new Set<string>()
 
-  const suggestions = useMemo<Entity[]>(() => {
-    const selectedValues = Array.from(new Set([...inputs, ...intermediates, ...exports, ...malls]))
-    const availableIngredients = Array.from(new Set([...selectedValues, ...calculatedInputs]))
+    let next: string|undefined
+    while (next = allProducingFactories.pop()) {
+      const pres = Object.keys(findFactory(next)?.recipe?.prerequisites ?? {})
+      for (const pre of pres) {
+        if (exportedFactories.has(pre) || base.has(pre)) {
+          if (!prducingSet.has(pre)) inputs.add(pre)
+        } else if (!intermediates.has(pre)) {
+          if (!prducingSet.has(pre)) intermediates.add(pre)
+          allProducingFactories.push(pre)
+        }
+      }
+    }
+    return [
+      Array.from(inputs).sort((a, b) => a.localeCompare(b)),
+      Array.from(intermediates).sort((a, b) => a.localeCompare(b))
+    ]
+  }, [exports, malls, ignoredFactories, baseFactories, findFactory, exportedFactories])
+
+  const [suggestionsExport, suggestionMall] = useMemo<[EnrichedEntity[], EnrichedEntity[]]>(() => {
+    const selectedValues = Array.from(new Set([...exports, ...malls]))
+    const availableIngredients = Array.from(new Set([...selectedValues, ...intermediates, ...inputs]))
     return factories
       .filter(factory => {
         if (!factory.recipe) return false
         if (selectedValues.includes(factory.href)) return false
         if (doNotSuggest.has(factory.href)) return false
-        const prerequisites = Object.keys(factory.recipe?.prerequisites ?? {})
+        const prerequisites = Object.keys(factory.recipe.prerequisites ?? {})
         return prerequisites.every(pre => availableIngredients.includes(pre))
       })
-  }, [doNotSuggest, factories, calculatedInputs, inputs, intermediates, exports, malls])
+      .reduce((acc, factory) =>
+        (factory.usedBy?.length ?? 0) >= 3
+          ? [[...acc[0], factory], acc[1]]
+          : [acc[0], [...acc[1], factory]],
+        [[], []] as [EnrichedEntity[], EnrichedEntity[]]
+      )
+  }, [exports, malls, intermediates, inputs, factories, doNotSuggest])
 
   const addFactory = (uid: string, type: Parameters<typeof setFactories>[2]) => {
     setFactories(name, [...group[type], uid], type)
   }
 
-  const setInputFactories = useCallback((factories: string[]) => setFactories(name, factories, 'inputs'), [setFactories, name])
-  const setIntermediateFactories = useCallback((factories: string[]) => setFactories(name, factories, 'intermediates'), [setFactories, name])
   const setExportFactories = useCallback((factories: string[]) => setFactories(name, factories, 'exports'), [setFactories, name])
   const setMallFactories = useCallback((factories: string[]) => setFactories(name, factories, 'malls'), [setFactories, name])
 
@@ -75,44 +94,47 @@ const GroupBoxBase: FC<Props> = ({ group }) => {
       {name}
     </h3>
     <button className={styles.quit} onClick={() => removeGroup(name)} style={{display: 'block'}}>X</button>
-    <label>Additional Inputs</label>
-    <FactorySelect
-      id={name+"-inputs"}
-      factories={inputs}
-      onSetFactories={setInputFactories}
-    />
-    <label>Intermediate Factories</label>
-    <FactorySelect
-      id={name+"-intermediates"}
-      factories={intermediates}
-      onSetFactories={setIntermediateFactories}
-    />
-    <label>Exported Factories</label>
+    <h4>Exported Factories</h4>
     <FactorySelect
       id={name+"-exports"}
       factories={exports}
       onSetFactories={setExportFactories}
     />
-    <label>Mall Factories</label>
+    <h4>Mall Factories</h4>
     <FactorySelect
       id={name+"-malls"}
       factories={malls}
       onSetFactories={setMallFactories}
     />
-      <h4>Inputs</h4>
+    { inputs.length ? <>
+      <h4>Input Factories ({inputs.length})</h4>
       <div className={styles.flex}>
-        { calculatedInputs.map(input => <EntitySpan
+        { inputs.map(input => <EntitySpan
           key={input}
           value={input}
-          onClick={() => addFactory(input, 'intermediates')}
           state={getInputType(input)}
-          leftClickText={"Add to intermediate factories"}
+          onContextMenu={event => {
+            event.preventDefault()
+            setIgnoredFactories([...ignoredFactories, input])
+          }}
+          rightClickText={"Exclude this recipe from suggestions"}
         />) }
-    </div>
-    { suggestions.length ? <>
-      <h4>Suggestions</h4>
+      </div>
+    </> : null }
+    { intermediates.length ? <>
+      <h4>Intermediate Factories ({intermediates.length})</h4>
       <div className={styles.flex}>
-        { suggestions.map(suggestion => <EntitySpan
+        { intermediates.map(intermediate => <EntitySpan
+          key={intermediate}
+          value={intermediate}
+          state={getInputType(intermediate)}
+        />) }
+      </div>
+    </> : null }
+    { suggestionsExport.length ? <>
+      <h4>Suggestions (Export)</h4>
+      <div className={styles.flex}>
+        { suggestionsExport.map(suggestion => <EntitySpan
           key={suggestion.href}
           value={suggestion}
           onClick={() => addFactory(suggestion.href, 'exports')}
@@ -125,6 +147,22 @@ const GroupBoxBase: FC<Props> = ({ group }) => {
         />) }
       </div>
     </> : null }
+    { suggestionMall.length ? <>
+      <h4>Suggestions (Mall)</h4>
+      <div className={styles.flex}>
+        { suggestionMall.map(suggestion => <EntitySpan
+          key={suggestion.href}
+          value={suggestion}
+          onClick={() => addFactory(suggestion.href, 'malls')}
+          onContextMenu={event => {
+            event.preventDefault()
+            setIgnoredFactories([...ignoredFactories, suggestion.href])
+          }}
+          leftClickText={"Add to mall factories"}
+          rightClickText={"Exclude this recipe from suggestions"}
+        />) }
+      </div>
+    </> : null }
   </div>
 }
 
diff --git a/components/home/Home.module.css b/components/home/Home.module.css
index 0ddb197..9876e31 100644
--- a/components/home/Home.module.css
+++ b/components/home/Home.module.css
@@ -1,6 +1,8 @@
 .grid {
     display: grid;
     grid-template-columns: repeat(auto-fit, minmax(500px, max-content));
+    gap: 1em;
+    margin-top: 2em;
 }
 
 .missingFactories {
diff --git a/components/home/Home.tsx b/components/home/Home.tsx
index 2000672..55a0071 100644
--- a/components/home/Home.tsx
+++ b/components/home/Home.tsx
@@ -3,7 +3,7 @@ import {GroupBox} from "./Group/Group";
 import {FactorySelect} from "./FactorySelect/FactorySelect";
 import styles from "./Home.module.css"
 import {useFactories} from "../../src/hooks/useFactories";
-import {Entity} from "../../src/types";
+import {EnrichedEntity, Entity} from "../../src/types";
 import pako from 'pako';
 import {EntitySpan} from "./EntitySpan/EntitySpan";
 import {useGroups} from "../contexts/GroupProvider";
@@ -16,15 +16,20 @@ export const HomeComponent: FC = () => {
     groups,
     addGroup,
     doNotSuggest,
-    baseFactories,
-    setBaseFactories,
     ignoredFactories,
     setIgnoredFactories
   } = useGroups()
   const [newGroupValue, setNewGroupValue] = useState("New group")
 
-  const missingFactories = useMemo<Entity[]>(() => {
-    return factories.filter(factory => !doNotSuggest.has(factory.href) && factory.recipe)
+  const [missingExport, missingMall] = useMemo<[EnrichedEntity[], EnrichedEntity[]]>(() => {
+    return factories
+      .filter(factory => !doNotSuggest.has(factory.href) && factory.recipe)
+      .reduce((acc, factory) =>
+          (factory.usedBy?.length ?? 0) >= 3
+            ? [[...acc[0], factory], acc[1]]
+            : [acc[0], [...acc[1], factory]],
+        [[], []] as [EnrichedEntity[], EnrichedEntity[]]
+      )
   }, [factories, doNotSuggest])
 
   const store = () => {
@@ -42,9 +47,9 @@ export const HomeComponent: FC = () => {
       <button onClick={store}>Store</button>
       <Preferences />
       <fieldset>
-        <legend>Missing factories</legend>
+        <legend>Missing export factories</legend>
         <div className={styles.missingFactories}>
-          { missingFactories.map(missing => (
+          { missingExport.map(missing => (
             <EntitySpan
               key={missing.href}
               value={missing}
@@ -56,7 +61,28 @@ export const HomeComponent: FC = () => {
                 event.preventDefault()
                 setIgnoredFactories([...ignoredFactories, missing.href])
               }}
-              leftClickText={"Create a new factory with this item and name"}
+              leftClickText={"Create a new group with this name and item as exported factory"}
+              rightClickText={"Exclude this recipe from suggestions"}
+            />
+          ))}
+        </div>
+      </fieldset>
+      <fieldset>
+        <legend>Missing mall factories</legend>
+        <div className={styles.missingFactories}>
+          { missingMall.map(missing => (
+            <EntitySpan
+              key={missing.href}
+              value={missing}
+              onClick={() => {
+                addGroup(newGroupValue !== "New group" ? newGroupValue : missing.name, [], [missing.href])
+                setNewGroupValue("New group")
+              }}
+              onContextMenu={event => {
+                event.preventDefault()
+                setIgnoredFactories([...ignoredFactories, missing.href])
+              }}
+              leftClickText={"Create a new group with this name and item as mall factory"}
               rightClickText={"Exclude this recipe from suggestions"}
             />
           ))}
diff --git a/src/hooks/useFactories.ts b/src/hooks/useFactories.ts
index 40b1550..3d5013a 100644
--- a/src/hooks/useFactories.ts
+++ b/src/hooks/useFactories.ts
@@ -1,22 +1,19 @@
 import {EnrichedEntity, Entity} from "../types";
 import details from "../../res/details.json";
 
-const factories = details as Entity[]
+const factories = (details as Entity[]).map((detail: EnrichedEntity) => {
+  detail.usedBy = (details as Entity[])
+    .filter(f => Object
+      .keys(f.recipe?.prerequisites ?? {})
+      .includes(detail.href)
+    )
+  return detail;
+})
 
-const detailsMap = Object
-  .fromEntries(
-    factories.map((detail: EnrichedEntity) => {
-      detail.usedBy = factories
-        .filter(f => Object
-          .keys(f.recipe?.prerequisites ?? {})
-          .includes(detail.href)
-        )
-      return [detail.href, detail];
-    })
-  )
+const detailsMap = Object.fromEntries(factories.map((detail: EnrichedEntity) => [detail.href, detail]))
 
 export const useFactories = () => ({
-  factories: factories,
+  factories,
   findFactory: (uid: string): EnrichedEntity|undefined => {
     return detailsMap[uid]
   }
diff --git a/src/types.ts b/src/types.ts
index 7656701..34c4e33 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -20,8 +20,6 @@ export interface EnrichedEntity extends Entity {
 
 export interface Group {
   name: string
-  inputs: string[]
-  intermediates: string[]
   exports: string[]
   malls: string[]
 }
diff --git a/styles/globals.css b/styles/globals.css
index 372363a..f6294c2 100644
--- a/styles/globals.css
+++ b/styles/globals.css
@@ -9,7 +9,7 @@ body {
 body {
   color: black;
   background: #FAFAFA;
-  padding-inline: 2em;
+  padding: 2em;
 }
 
 a {
@@ -21,6 +21,19 @@ a {
   box-sizing: border-box;
 }
 
+:is(h1, h2, h3, h4, h5, h6):is(:first-child) {
+  margin-block-start: 0;
+}
+
+h3 {
+  margin-block: 1.5em 1em;
+}
+
+h4 {
+  margin-block: 1em 0.3em;
+  font-weight: 500;
+}
+
 @media (prefers-color-scheme: dark) {
   html {
     color-scheme: dark;