>>10840277If you lift your leg and twist it in a 3600 motion you'll find that most of the radial movement in that part of the leg comes from below the knee. My idea is I'd make the bottom of the kneecap a cup and ball joint and the ball inset with a post into the upper calf. This joint matches the muscular shape in that area so it will be well hidden and give an even better range of leg motion than the swivel can without breaking up the sculpt.
