Hi,
I'm one of those that criticised the utterly broken search function repeatedly and suggested a potential solution (that was then conveniently ignored, but never mind). But in this case the search function actually works, to some extent. If you type in "canonet iris stuck" you get this:
http://rangefinderforum.com/forums/search.php?searchid=901588
Which is of course utterly useless because it returns any post containing "canonet", "iris"
and/or "stuck". But if you go to "advanced search" and type in the same query and limit it to the Canon RF forum you get this:
http://rangefinderforum.com/forums/search.php?searchid=901576&pp=25
There are some useful results in there. So by slimming down the search to a subforum related to your problem, you might eventually hit upon something useful. The problem with that is, of course, that due to forum inflation, it's becoming somewhat unclear in which forum to look for a given solution; in this case there are at least five forums where one might want to look ("Canon RF", "Fixed Lens RF", "Repair/Camera Care", "Fixed Lens Camera Repair", "Gen Camera Care & Maint"). Also the search function only goes back a limited amount of time. Still, by tinkering around with it a little bit you may be lucky and find what you're looking for.
Philipp