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Basic design and drawings are from French site: http://gm.cnc.free.fr/en/mechanic.html .
Electronic circuit is from cheap self design, made of ttl and Tip (costs less than 10Euro).
I wrote the code needed in order to cut tapered twisted swept wings with different root and tip profiles, four digits NACA or .dat file as well. The code applies a correction to the wire path according to data retrieved from a cut test that should be performed whenever foam type or environment conditions should change.

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