I've been offered yet another sensor that should come in the next two weeks. I'll keep you all posted.I have both the Brompton kits working and mostly I like them. Mine cuts in and out a bit and it is a bit slow for the power to cut in I will play with the settings and see if it improves.
I'm running on the "50 mile" battery and I think 50 miles is very very optimistic.
And, of course, I still have two kits that will not fit on the intended bikes.