Vito II teardown

[KoNickon]

Hello,
I'm new in this forum. I'm from germany, so I apologize if my english isn't that good.
I've recently accuired a Vito II with a Prontor-S shutter and a f 3.5 Color Skopar lens. The camera seems to be in a good condition, the lens is clear. The aperture and shutter is working, altough the self-timer is stuck (the cocking lever for the self-timer does not move). The shutter speeds are a bit slow. I've serviced a Prontor-S shutter before on an old Agfa Silette; the service went well.
There is a nice video from Chris Sherlock on Youtube where he services a Prontor-S shutter. Detaching the geartrain for the shutter speeds is pretty easy, its really just 2 screws and you can take it out and flush it in naphta. I even diassembled the geatrain itself on my Agfa and cleaned all the gears and the shafts. It's a bit tideous to put it all back together, but all speeds are running just fine now. I will post the link to the video if I can find it again.

For now I am wondering on how to gain acces to the shutter without destroying the focus stops and I am looking for a bellow replacement, since the bellow is not made out of leather as far as I know. I own a Zeiss-Ikon Nettar where the outer surface of the bellow is made from leather and the bellows held up just fine after more than 60 years.

Best regards

I'm stymied with my Vito II at the moment. You're right, Chris's video shows that it's easy to remove the shutter speed geartrain -- two screws. My problem is that one of them I can't get at -- it's blocked by the part of the geartrain that contains the pin that rides along the speed cam. Don't know the name of that particular part, but it's supposed to move out of the way easily to get at the retaining screw below it. However, it's jammed in place and I can't move it to get access to the screw right below it. Maybe I need to remove the selftimer assembly first but I don't see that doing so will help.