Ring bending machine.
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Previously:
https://www.homemadetools.net/forum/...231#post180755
https://www.homemadetools.net/forum/...165#post180449
https://www.homemadetools.net/forum/...849#post179163
https://www.homemadetools.net/forum/...349#post146393
https://www.homemadetools.net/forum/...2773#post97101
