Slow and noisy, but it works!
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Amazing! I've been thinking about attempting one of these, but I was put off by the fiddly machining. I hadn't thought of your excellent workarounds.

Do you plan to release the mechanical designs at some point?
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Aww thanks! This is the result of many months of trying to find an achievable method, I’ve uploaded the CAD files here but I’d suggest anyone uses build techniques that works for them github.com/simonboak/Paper-Tape-Punch
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