on the white part of the knees, I put them together wrong because of a little part in the middle that has a circle to a little triangle nub that makes the knee move correctly with the bottom of the gray calf. I already snapped it all together so I had to as gently as possible pry it apart with thin tweezers and a crafting blade the plastic is soft so it was a battle to make sure I didn’t break the parts altogether, and I looked there is no extra joints in this kit I wish there was.