That will be a part, for my custom Delta printer. I am trying to remove the need of any screws. --update: made one by today and figured out that i still have to reduce the overhangs and increase the arm length.Right now, the stab must be turned along Y axe, by 90 degrees. Hopefully i may print joints like that along another axe than z. You may need to resize the joints or reduce the wall thickness in your slicer.