Hi, i’m working on a corexy printer with 20 steel tubes and made these corners (the ‘big one’ will be on top of the printer, the economic one, with his symetric, at the bottom). Both are easy to print and tested: very stiff. The big one has some ‘GT2 belt’ insert to reduce the noise of the motor and to improve friction.
It’s just to give you some ideas, in case of… But your new corners looks already pretty cool. And thanks for your work! (it’s my first post, I’m still printing my IE MPCNC, with his too wide holes for nuts and too small for nylon ones :=D ).