Recently I bought a really nice Grandagon 155 f/6.3. It's on a Technika board and I want to move it to a Sinar board. The retaining ring fixing the lens to the board is so ridiculously tight that I can't begin to loosen it. I am using the tool pictured here.
When the metal of the tool starts to flex I stop. Don't want to break it.
What kind of tool allows you to put more force on the ring?
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