Corner joints for hood enclosure CTC

I designed these corner joints to put together the hood of my CTC 3D printer. I didn't draw holes in them because the size depends on the diameter of the bolts you are using. You have to drill them as you drill the perspex sheets.
If you want to do it like me, you need to print 5 90°joints (joint.stl), 8 small 90°joints (jointsmall.stl) and 2 120°joints, (jointangle.stl).
The back of the hood is fixed on the printer, the rest is removable.
The size to cut the perspex sheets are specified in t