m-rokkor 40/2 disassembly

[rionda]

Has anyone ever disassembled a m-rokkor 40/2 ?

The aperture ring on mine is very hard to move, probably because some screw came off or something.
I thought disassembling the m-rokkor would be similar to opening the summicron-c 40/2 as described in this video., but they seem to be built very differently...:bang:

 

[Ko.Fe.]

I disassembled focus helicoid. It is dual, not uncommon to another dual helicoid lenses I did. But this one is tiny threads. So, I ended up buying new helicoid.
Forgot to mention, mine was late version, CLE.

 

[rionda]

Yeah, the screws seem veeeeery tiny, to the point I cannot even see them...

Thanks anyway. I'll probably sell it for parts or something.