Leica prisms

[MikeTurnrose]

Does anyone know how to tighten the vertical axis on the Leica standard GPH1 prisms? I don't see any adjustment screws or anything of the like on these. One prism I have is too loose for rotating vertically and would love to fix this without taking it to the shop. Thanks.

[Rob_LS]

If these are the old style prism holders for the T-1000, -1600, -2000 series instruments, I used to put some flagging in the attach point to give it some resistance to rotating... Another of the 1000 and 1 uses for flagging...

[MikeTurnrose]

I ended putting some tissue in there for resistance. I'm not sure if that's what they were designed for, but it helps.