Anyhow, uninstalled the knee joints and threw them in the trash. Absolute garbage. Could not get the left knee joint to stay in place with posing and transforming. The right one then cracked and broke. Ended up getting a refund. Um, you don't need to remove pins at all. Only removal needed is the screws from the lower legs with a blunted Philips #0 screwdriver to avoid stripping the screw heads. Cranking the knee forward allows the most space to physically remove the old joint and place the new one in.