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Forum: Repairs and Warranty Service 06-02-2018, 08:12 AM  
Dumb thing I just did to my M 35/2.8
Posted By c.a.m
Replies: 16
Views: 1,464
I have encountered similar tight screws on several Pentax-M mounts. Here's my track record:

- Lens A: 3 of 5 screws removed no problem. Soaked 2 in 'deep' penetrating oil. One of those freed up. On the last one, the star head was deformed ('ground out') by my JIS screwdriver... just a bit too much force on my part. I ended up using my smallest Dremel bit to grind out a slot for a common screwdriver -- success. I had spare screws from another sacrificial Pentax lens.

- Lens B: One screw was solid. Applied 25 watt soldering iron and managed to tease it out unharmed.

- Lens C: Similar to Lens A, except nothing worked. Drilled out the two screw heads on my drill press (sacrificing the mount), but their shanks remained with very small stubs. I'll need to get those Moody micro-extractors for the next attack.
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