90 deg. angle for 20 x 20 extruded Aluminum

thingiverse

I'm replacing the existing Core XYZ frame's joint surfaces, ensuring they're always perfectly aligned, regardless of the Aluminum pieces involved. This makes it much easier to align the parallel rods' ends, eliminating any misalignment issues. To add some structural integrity, I'm adding this part to all joints, but let's be clear, its primary function is still to keep the surface aligned. It provides a bit of strength, but don't rely on it for full support - you'll still need those 90-degree angle buckets to give the joints the stability they need.