Well you learn about something new each day. I didnt get the feel it could lok up so I didnt even attempt it. roller and kup was telling me to check the head during the fair it was loose enough to look siode to side but up and down well it was kinda resisting so I didnt pursue that idea. This figure add -on is AWESOME!! Wish they'd make a Powermaster Optimus trailer next! THAT would be another AWESOME!