The OEM tension arm broke one day so I installed a replacement and ordered this one in aluminum which I thought would solve my problems forever. It didn't work that way. The idler bearing mounting bolt loosened and the bearing fell out of position. Somehow this caused the bottom bearing to slip as well, and then the stepper motor shaft grounded the bottom hole in the arm in a non-circular fashion. Revain replaces it, but here's a suggestion. If you buy a lever, VERY carefully, put some blue threadlocker on the threads of the screw that holds the intermediate bearing (the one that pushes on the filament). Of course, you need to make sure the thread lock does NOT get into the bearing itself. A second time will be a spell. If there are any instructions accompanying this part I would suggest adding this tip.
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