Corner brackets to help brace the frame as it's kinda weak from the start.
Print them in PLA at 40-70% infill with 5 perimeters and they add quite a bit of strength to the frame.
You can check out more info about why I use these and other projects here:
Check me out at:
3d hubs: https://www.3dhubs.com/malm%C3%B6/hubs/mrcrankyface
3D printing nerd and wannabe-engineer. Making random projects from RC trucks to nerf guns, interested in pretty much anything technology related.
I do youtube videos about most things I make.