[Frank Lee]

There's a right and a wrong way to just about everything.

Yes, too much heat with a torch for reshaping the "seat" coil could be bad I suppose. Too much heat in the cutting operation could also be bad I suppose. Not putting a proper seating coil in probably hurts. Cutting too much off of course leads to bad things.

Musta got lucky.

Edit: Should have said "There are several right and wrong ways..." If you can use clamps in your application they're probably just fine. I looked at using clamps on my car first and decided they wouldn't fit in there, hence the cutting. But if they would have fit, I would have gone that route.