I was talking with DeeJay and we were discussing swapping out parts for sideswipe and sunstreaker to make tigertrack and sunstreaker (diaclone). Our problem was popping out the pins for the arms to switch the doors, since we couldn't get to the screws. Then I discovered something... Grab the arm in one hand and the door in the other and simply pull. that's it. It's a plug/snap fitting with a screw in the middle. nothing more. save yourselves hours of pin-popping!