2020 Aluminum Extrusion Frame Inner Corner

This part is a inner corner bracket for 2020 Al extrusion. It is meant to go with the 2020 Frame Corner found here: https://www.thingiverse.com/thing:1612368 These two parts allow one to build a very sturdy printer frame with just printed PLA parts and metric screws.

General Specs:
- Print at 40% for Strength, PLA is fine
- Layer height at 0.2mm for screw hole/countersink accuracy
- M4 Metric Screws with 2mm Countersink
- Channel slots for tight and square fit
- Each Aluminum piece is c