Elegoo Mars Array / NanoDLP Overhaul

**Changelog is in a separate description below. I will update every change**

12/28/2019: I forgot the feet stick through the base. I modeled up some feet. Pretty fun actually. Stick 4x M5 25mm studs into the feet holes, secure against the underside with an M5 nut, drop an M5 nut into the feet, twist on/level the printer. If you don;t care that much about leveling, fixed length feet are available.

Please let me know what boards you would like to see support for. I will analyze space constraints and try to make it work.

I was heavily inspired by fcollingwood's D7 overhaul. I don;t know how to work with meshes, so I had to build this from scratch.

Both enclosure sides and the MP1584 holder require bed+object supports. Recommended print orientations are shown The MP1584 mount should be printed in PETG since the 'wings' need to flex.

Parts are slightly oversized to accommodate different tolerance printers. V1 will employ heat-set threaded inserts in M3 flavor. I sugg