When you need to cut a lip slot by hand this help to prevent denting.. A piece of PVC cut to size to hold the lenght of the plug so it can rest on the bottom of the vice with the lip area above. Two 1in holes drilled so your fingers can grip the plug inside. Wrap the plug with a piece of foam, 1/4--3/4 thick and insert in the PVC for a tight fit. Clamp the pipe tight in the vice and using your fingers to hold the plug steady make the cut.
Cheapest Bandsaw ya can make.
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