I think I know how the hips will work now; Basically, the legs will attach with ball joints and this v shaped piece can articulate side to side to give more space to move. The way I've positioned the joints there's already plenty of room but if the leg needs to go especially high I can use this. Once assembled the hole you see will be on the back but I have it facing up to be easier to print. I also have a peg that'll go in there but it's off screen