1020 t-slot 90 degree corner bracket

This is a doubled version of my 1010 corner bracket. This is for 1020 size 80/20 t-slot.

Update 10-12-16: I have included the outside corner brackets for my large 3D printer / CNC machine project (which is currently on hold), but also for the Personal Food Computer project i am going to build (by borrowing/repurposing the frame for my unfinished large 3d Printer / CNC machine project). I have included 4 different possible configurations depending on the type you want to use, as well as the Solidworks "master file". Enjoy!