Way to fix a loose , rotating 135 Tele-Elmar?

[nightfly]

My 135 Tele-Elmar rotates when I turn the aperture ring. It doesn't ever unscrew but you have to actually stabilize the lens with your other hand to change the aperture or the whole thing rotates unless you get it just to the perfect place where there is enough tension to hold it in place.

I think it has something to do with being able to use with the Visoflex system but it never actually comes off just spins around. Have tried tightening the visible screws to no avail.

It's a quirky lens to begin with but I do like it for compressing space for more abstract imagery. Wondering if it's a common issue with a fix?

 

[a.noctilux]

Strange, I use one (or two) for years with pleasure.
Sometime I unscrew the optical head to put on OTZFO adapter to use on Visoflex.

Just try to unscrew the optical part fully, look if there is something inside that move, then screw it back to tighten.

 

[nightfly]

Unscrewed it and screwed back in but only succeed in somehow losing the click stops in the aperture ring.

Guess I broke something else.