With anatomy parts being available I'm guessing that crafting isn't too far off.
I'd just like to say that when implementing crafting this would be an ideal time to fix one of the biggest game balance issues this game has, that being that there is
almost no reward for specialisation and will usually reward generalisation for item production.
With that in mind if there are new buildings, or workshop upgrades associated with crafting could build times and cost be more real reflective of real life. I.e. huge investment to start up but progressivly becoming cheaper and faster to expand.
Alternativly if normal troops can use crafted items too then perhaps production time could follow a greater logaritmic increase with building level ie production time = 100% - 1.25^(building lvl.)