I don’t have access to a 3D printer to make the dyi stop plates for the hinge that connects the bottom part of the center section to the legs. I was wondering how I could find a way to quickly unfold the legs to the same position each time so that the hoop lines up perfectly. I have found a simple, easy way. Just set up the frame and completely assemble the netting so that it is ready for flight. It may take some small adjustments to get the center plate at the right angle. When it is perfectly adjusted, take a marker (I used a silver magic marker) to mark the position the hinge was in by making a straight horizontal line across the hinge. This way, each time when you unfold the hinge, you’ll know exactly how far to unfold it to get a perfect straight hoop with tight netting. See pic for silver marks on hinge.IMG_0460|669x499