Various 20x20 V-Slot Extrusion Brackets

Corners fit nicely into a 90 and ribs align with v slot groove. Rotated to print easily. Other pieces are basic Ts and Ls. Nothing special there. I would add the V slot rib but their placement depends on how the extrusion butts up to the piece.
Note: Corner piece holes are printed to 1mm on purpose. Drill out to 5mm.