I decided to build a simple bot factory that uses simple inputs and processes all intermediates (except ore->plates) internally. It needs an input of one yellow belt of iron plates, one yellow shared belt of copper plates and coal, crude oil and water. It can build 22,5 bots per minute and is fairly suited for an early taste on mid game. It fits within two chunks, with two spaces to spare outside (most of) the outside wall. Internal defenses with gun turrets are ready to welcome visitors once primed with a little ammo (they are not a main defence, but can help to slow a random biter attack before you've got a main wall/eradication going). Mostly just for fun and to see how big a bot factory of this style I could squeeze within two chunks space. Have fun, and keep that factory growing.