The other option is to forget about the stainless and ream/drill out the tubing/pipe to the diameter you need. That's what I do to make hidden hinges. It's a bit tricky to get holding the pipe straight and true in the drill press...but it can be done. I also use a plastic of brass sleeve between the hinge "hoop" (the pipe you are boring out) and the hinge pin. This helps prevent squeaking later on and also allows a bit more fudge factor when reaming out the pipe.
Always learning...and sharing what I've learned.
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