Originally Posted by
nashvillebill
Well I do agree that the proper use of a file is a lost art, .... but I dunno about faster, a Dremel with a good cutting wheel is pretty quick!
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This job calls for about 6 hard strokes with a file. Having done similar jobs a few times, I assure you that I could file it before you could plug in the Dremel and select and chuck the cutter.
That's not to mention the space limitations that make using a Dremel to cut the tube back to the inside wall of the shell awkward.
BTW - if you're going to use power tools, a 1-5/16" hole saw is faster. Grease the OD and use the shell to guide the cutter.