Yes, I believe you're correct, seems the only one I question is Mr. Do.I think the black one goes under the cp. That's why the joystick spaces itself away from the cp. As with most games, the dust washer goes under the cp. The difference with Universal is the hole size combined with the short shaft is a safety hazard for knuckles without also having a dust washer on top of the cp.
I 3D printed a black one to go underneath on mine, which worked out great, paired with the clear one on top as shown in my earlier post.
An original panel never comes up for sale, and when an original game is sold I never see what looks to be an original joystick on the panel. A lot of times even a red Wico is on an otherwise original game. Just no way to know for sure if short or longer or if white washer is on top.
Seems like most all others look like below, short with the washer underneath.












