I have been chasing down a creak while pedaling. I was checking the bolts that hold the M600 to the frame and discovered one of the bolts was too long and allowed the bolt to move with little effort. If you are having a creaking issue check the 3 motor bolts. They should not be able to rotate. I took a picture of the assembly issue. If Eric reads this I would like his explanation as to why when the motor had the silent gear installed the installer did not catch this. See where the threads end and do not allow the nut to be properly torqued. I am going to install a washer to give it spacing.

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