Boat Cup Holder
thingiverse
designed in tinkercad, as a replacement cup holder adapter for my inlaws boat converts a 72 mm outer diameter hole to a 92 mm inner diameter cup holder, with 2 mm thick walls. I printed wit .2 mm layer height, .4mm nozzle, concentric support, 3 line walls top/bottom thickness of 2 mm infill doesn't matter with the thick bottom
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