Desktop BlackBelt (Patreon)

I'm on the concept phase of a Desktop BlackBelt like printer. The main goal for now on this project is to be able to print multiple copies of the same part unattended, which would also solve my problem with the last 100 grams of every spool. There are still lot's of issues to solve but I think this is a good time to ask for input. If I end up seeing it feasible, which features would you be interested in? print size? speed? multi-material? IDEX? 

Thanks!!