I was kind of annoyed at how limited possibility for Magnus was. There was clearly some intent to make the legs move deeper with how the thigh has recessed areas near the joint, but the lower legs are blocked off. The only tools really needed are nippers, but a wood chisel or knife can work too. Orignal unmodified leg, note the back of the knee clearance. Modified knee, extra 45° Originally I tried going to the first vent, but it's not enough clearance. Modded and original Note the bottom left corner on the left/block on the bottom right inside You need to removed the highlighted area. You don't need to go too far in since the teeth on the knee fit perfectly. It really feels intentional. With the nub gone.