Cheap carbide scribe plus part of a Cannondale elastomer HeadShok unit. I don't have photos of the process, but I bored the HeadShok part to accept the scribe, then turned that assembly down until it was the same size as the original Cricut tools.
The O-rings are to hold the tool in place until the clamp is closed. The part wasn't large enough to machine a lip.
Neil
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