So, yes, this is a new low...
My copy is suffering from a sluggish aperture closing/opening (it is not the blades, it is 99% sure some kind of grease/residue on the mechanism). So in order to clean it I must access it from the back:
Well, the back screws are just too damn tight! They won't budge... So I researched the topic - tried a rubber band to the head, nope; tried different JIS sizes, nope... then I decided to try and heat a screw with a soldering iron... I read that you should really let the screw cool off after heating it. I did not do that; I went for it while it was hot. The result?
Yes, that screw to the right basically has the tip of my JIS 00 screw driver adhered to it! The thing just tored my JIS screwdriver and ate it!
Few things that annoy me - I know my JIS set is cheap, so I ordered a rather good one today on the web. I obviously did not get it yet, but decided that I was bored enough to give this idea a try, rather than just wait for the quality tool.
Now, can anyone suggest an option? It really irks me that I would have to send the lens somewhere to be treated - I have cleaned slow apertures on other prime lenses before, it is rather easy to do (did it recently to a 50/1.8 Zuiko "Japan", which is also notorious for this). By mid June I am sending Eric a Spotmatic and my ME Super for CLA; is this my last resort?
Some info on how bad the aperture on the lens currently is - I really cannot use it on a DSLR at f8 or above (hence, wide open or other wide apertures would work OK).