Question: How specific is BP category for BP drops?

If a feller would want to loot, say a finder tool BP, does he need to click other finder tools specifically or does crafting any tool give him equal chances of succeeding in his pursuit?

Can BP drops jump even further from their category? Can clicking a weapon drop armor BP etc?

Thanks!

BP being used/wanted:
the BP loots are tied in the following categories:
Mechanical, electronical, metal BPs do drop/loot from mechanical, electronical, metal BPs (they are same loot-pool)
Weapons are same loot-pool, i.e. laser crafts can drop fist, sword BP and so on and vice versa
tool, furniture, enhancer, tailoring, vehicle, armor, attachment, material have each their own loot-category, i.e. vehicle crafts drop only vehicle BPs, tool crafts do only drop tool BPs

full crafting guide:
https://www.planetcalypsoforum.com/forums/showthread.php?305334-little-crafting-guide

you don't have to do finder craft to loot finder BPs, tool BP will do.

Great answer, thanks man!