Some starting clamps have the diamond coating on thin plates like yours and others like the ones at gss have the coating right on the clamp itself without the plate.
From what I've seen, only the Gamma has these plates. The surface they're glued to isn't really machined flat or anything, it looks casted/molded to my uneducated eye. This doesn't promote great adhesion...
Ah ha! I didn't know that. Perhaps I should snag one of the gss clamps, as obviously this issue can't happen if the coating is right on the clamp itself.
Thanks for the info.
Go with the GSS clamp, it's the most well rounded, IMO. The Alpha fat-jaw is too harsh on string. I DO trust the alpha to hold to near 3 digits in tension, though.
i recall someone else had this problem w/ the Gamma starting clamp.
out of the 3 different brands of starting clamps i have owned and used, the gamma was the worst. eagnas and babolat starting clamps are better from my experience. other's experiences may vary.
It might be me
I have owned/worked with around 7?? starting clamps over the years. The gamma(s) I've used have been the worst (starting) clamps by far. My experience has been echoed with people I've worked with (and shared tools with). The diamond dusted plate is too smooth. It works very well provided you have no slippage, but once slippage occurs... It's also hard to clean without clamp disassembly (which I never attempted). Isopropyl and/or acetone don't wipe out gunk, I imagine a wire brush would do admirably. I tried the sock/shoelace/isoprop trick, but it didn't work very well.
GSS RAB (used to be RAB/Alpha) clamp is excellent.
Alpha clamp (current version) has aggressive texture in the jaws, the jaws are wide, and the springs are ridiculous strong.
Babolat clamp (that I've tried) is similar to the Rab clamp with wider jaws. The one I own doesn't have eyelets for bridge usage, so I don't use it.
Babolat clamp 2: Very similar to the Alpha clamp, texture is more gentle than the Alpha clamp, but jaws are thinner and more squared off than the current RAB clamp, very similar, though.