I've got an Agfa Karat 36 that I'm in the process of cleaning all the green goo out of, and it has the Synchro-Compur MX. Made the mistake of taking some parts off to get the front piece off the camera, when all I had to do was take the entire shutter off first. But it's back together and working. Good thing I take photos of the process.
I found that unless the shutter cover is in place, the charging ring will lift up and disengage from a few things it's supposed to push one way or the other, thereby rendering any test firings mute, and making it look like the shutter is defective. But with the cover on, you can't watch the mechanism movements while it is operating. Not the best design. I think at the factory they had a custom made ring to use in place of the cover, so they could make adjustments to the timing.
Thanks for the tip, Nick. Mine looks like it will do that too, but will watch the levers with the top off to see what actually happens.
PF
I'll amend this by saying you can watch the movements through the speed cam, but it limits your view, and you need to have a good grip in the shutter or it all goes kablooie. 4/2/12