I am glad you love your B. I find mine to be a keeper too. I do have an 8000 ft hill in my backyard and while my most recent setup is a 2 speed 12/16 with a 58 tooth chainring sometimes a lower range is very good. So I added a 38 tooth chainring and have a set of "granny gears" for steeper hills and even moderate ones with a stout headwind. BTW, a regular SA 3 speed has 3 bumps, not the 9 Shimano gears have. I don't know if the wide ratio BWR that comes with 6 speed Bromptons uses Shimano sprockets or the 3 nub ones for thec177% 3 speed. I don't have a derailleur for the front 2 chain rings and go with the greasy finger shifter method. This deal gives me a 77.8 gear inch high and 60 or so for low with the 58, and bout 58 and 35 for the 38, if my memory is correct. Total weight of this setup is far less than an SA IGH.