sanding block
thingiverse
simple sanding block Needs 2x M4 nut, M4 threaded rod ~32mm and optionally a washer. Recommend 2mm thick rubber, strong foam or felt on the outside (160x35mm). One of the nuts should be inserted in the knob: pause at the appropriate layer and put the nut in, continue print. Other nut must be pressed into the slot of the body. I cut my sanding paper 35 x 200mm.
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