Fabber question about UNITTYPEs

Currently I have an advanced bot fabber that can make only t1 factories; bot and vehicle.

It is supposed to be able to build the advanced vehicle factory, although I don;t know what unittype combination requires this. Below is the code for the adv bot fabricator.

Code:

"buildable_types":"Land & Structure & Advanced - Factory| Factory & Advanced & Bot & Land | FabAdvBuild | FabBuild",
  "unit_types":[
    "UNITTYPE_Fabber",
    "UNITTYPE_Construction",
    "UNITTYPE_Tank",
    "UNITTYPE_Mobile",
    "UNITTYPE_Land",
    "UNITTYPE_Advanced",
    "UNITTYPE_FactoryBuild"

Below is the code for the advanced vehicle factory

Code:

"buildable_types":"Mobile & Tank & FactoryBuild",
  "unit_types":[
    "UNITTYPE_Factory",
    "UNITTYPE_Construction",
    "UNITTYPE_Land",
    "UNITTYPE_Tank",
    "UNITTYPE_Structure",
    "UNITTYPE_Advanced",
    "UNITTYPE_Important"

I've never had to do this so i'm kinda confused as to what this really means

Thanks

PS. Sorry if this is in a guide somewhere, if there is one i'm not aware of it

Use this

Code:

"buildable_types":"Land & Structure & Advanced - Factory| Factory & Advanced & Bot & Land | Factory & Advanced & Vehicle & Land | FabAdvBuild | FabBuild",

oh right that actually makes sense that the default bot fabricator would only build bot factories

Actually replace vehicle with tank. Imma durp.