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I printed one of these for Easter this year. My family really enjoyed it! Thanks for the innovative design. It's much cleaner than the ones with threaded rods and I had no real issues with printing on my Flashforge Creator in ABS plastic @ 0.3mm layer thickness. A few requests for improvements would be as follows if you plan on making changes in the future:

  • Add a standard round (not flatted) version of the suction cup with a screw hole for a set screw. This would allow for moving the suction cup left and right on the motor shaft in order to allow for centering of different sized objects.

  • Move the inner bearing more towards the center of the model creating a larger distance between bearings. This would provide more stability for the 5mm rod, helping to remove any potential wobble on slightly undersized shafts.

Thanks again for a great model!