Vixen Motor Cover Tabs
thingiverse
The tabs that secure the motor drive cover on Vixen Polaris series mounts frequently break off. This is a replacement tab. It just pushes in to the adjacent ventilation hole in the cover. You could glue them it but so far it hasn't been necessary for mine. I've learned that some versions of the motor cover don't have a ventilation hole adjacent to the tab, so I've added a flat bottom version that you can glue on to the cover. I printed mine in SainSmart TPU. You want something somewhat flexible.
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