Which books contain rules for crafting? I know that the FaD gm kit has rules on crafting lightsaber hilts and keeping the peace has rules on armor crafting, which books have crafting rules?

The technician book.

Which is Special Modifications.

From memory it's Melee Weapons, Ranged Weapons, Gadgets (tools) and Droids.

So (across the lines) we have pretty much everything except vehicles and spaceships?

I knew I forgot something, Cybernetics is also in Special Modifications.

So (across the lines) we have pretty much everything except vehicles and spaceships?

Yes