So I went to Electric Cyclery expecting to have the BionX 48V kit put on my GT Avalanche, but no such Luck. It wouldn't fit because the rear dropouts on my bike weren't deep enough to accept the axle of the BionX motor properly. The installer wasn't comfortable with the fit, and if he wasn't, I certainly wasn't going to push it. Words like "possible catastrophic failure" weren't reassuring.
So long story short, I rolled out with my second choice, a more expensive Stromer. Based on web research, I'd thought that all I needed was the "entry level" model for $2,850. But come to find out that was the 2011 model and no longer available. By the time I left, I'd talked myself up to the top line Elite model, with 27 speeds, and hydraulic disk brakes.
Oh well, my LEAF Is saving me gas money, right?