You are highly unlikely to find a USB cable that wont need some strain relief. The problem is within the MR module. The port in which the cord plugs into is too high off of the module, which means any type of USB will be hanging out, and will cause the MR Port, and ware a lot quicker. A simple, less than .03 cent piece, whether it be a 3d Printed part, Piece of wood, or screw, can save you so much heart-ache, pain, and time.
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