John Heisz - Speakers and Audio Projects | How To Make The Hole Bigger (in a washer) and why I'd want to do that @IBuildIt | Uploaded 6 years ago | Updated 5 hours ago
Bit of a quick tip her on drilling the hole bigger in a flat washer. Holding it with the vise grips as shown and using a step drill gives the best results.
And go easy on the smaller hole, tighter fit jokes!

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