Pieces of steel in cylinder??

Here’s what I came up with. Instead of grinding down one of my expensive F clamps, I found a large C clamp I’d be willing to part with.6DAD5AAD-7895-4E81-98FC-1345B218A19D.jpeg 42B79662-9B1F-4C6E-AB51-C8A8BDA6B1C8.jpeg95AE373B-BF2E-4588-99EF-ABB171E5E57A.jpeg

The seat on the screw of the clamp wasn’t large enough to mate with the valves nicely, so I used a hole saw for the plate steel, then welded it to the seat of the screw on the clamp.

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Let’s see if it works, can’t be worse than the POS that clamps to the valve spring.