Melzi cover for Mendel90

I'm still learning the ins and outs of modeling. So building a pcb cover for my Mendel 90 seemed like a good project to practice on.

Sliced at 0.2 layer height with a perimeter of 2 using PLA.

**UPDATE - Added a second version with a few vent holes and the "MENDEL90" text knocked out for additional air flow.