Hi all. The E6000 motor seems to be at or near the end of its production run (you can still find some for sale) and I note the maker of my e-tandem is now installing the E6100. I enquired whether if/when my motor dies it would be possble to upgrade to an E6100, and, of course, the answer is no., it has diffenent mounting points. My bike is in perfect condition and I'd be very disappointed if I had to junk it when the motor wears out. I know there are people who recondition motors, but I was wondering if anyone has looked into aftermarket adaptor kits to fit newer motors to bikes equipped with previous Shimano models .