My take on your list:
1: I'm going for belt. My goal is better and faster than hand placement, and belt (GT2) is more than enough for that.
2: Agreed.
3: Cam, just because Zapp has a nice motor for that: SY17STH0404-200TR8X8-EX
4: I'll have extrusions bolted on table along X, Y shafts mounted on these, tapes coming in under the Y shafts.
5: At least as important is the driving algorithm. I think I'll use TinyG driver board (https://www.synthetos.com/webstore/i...cs/tiny-g.html). It has 3rd order acceleration, and allows customization of the software (I know how to program Atmel micros). TinyG and Nema17 motors are fast enough for me: https://www.youtube.com/watch?v=Om0w...feature=relmfu