Help for changing Calumet C-1 ground glass

[F64]

Hello,
I need to replace the gg. It is held in place by three clips, which I think I have to loosen. I cannot figure out which kind of screwdriver I need. Help would be much appreciated.

[Bill Rolph]

On my C-1 they are normal Phillips heads. Can you provide a photo of yours?

[F64]

Thank you very much.
I thought so, but they are not so common here. Do you have an idea of size? It seems pretty small

[Bill Rolph]

I just had a look at one of them under the microscope. They appear to be #2 imperial machine screws with 56 teeth per inch, and a standard Phillips head. The heads on mine are stripped, so I got a thin metal saw blade and cut a slot along the diameter of the heads so I could use a normal flat head screwdriver. Hope that helps.

[F64]

Thank you, Bill. It helps a lot.