About this 3D model

Printed the original with PETG, but the threads are a bit sticky, I used a M6 tap to cut the thread on the nut and it works better, but the size of the base didn't quite fit on my rack, so I changed the dimensions by 1mm, also the threads of the screw were a bit weird for the begining. I also created a tightening key, since I was partially destroying the nuts with my metal wrenches.