Cat toy fish tail prothesis
thingiverse
Replacement tail for a popular cat toy fish. Original tail is made of weak plastic and starts to swing around the spindle after a while, this model loosely recreates it. May require some adjustments depending on the actual spindle you have and printer type you'd use. My fish had 25mm long 2x2mm square spindle, so I made a square hole 2.2x2.2mm to adjust for possible resin drips during the printing. If you're working with plastic, you should probably shrink that hole. May also require some sandpaper finetunement. I used autogenerated supports from photon workshop. UPD: better version there: https://www.thingiverse.com/thing:5640640
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