Valve spring seat and seal tooling

moper said

I know a guy that fervently believes in unicorns. Doesn't make them real. If you know record holders using hand drills they must be in the Briggs classes... Sorry YR. Wrong answer.

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Why would I make that up.

100% for real. I've had to do it a few times by hand, but I prefer to do it in the seat and guide machine. The pilot centers the cutter in the guide.

Again, it ain't rocket surgery.