I wonder if it's possible to get hold of Flamingo spare parts. . . I've just built a 5 speed wheel and will soon be putting in on my Brompton but I know I'm going to wish I had a grip shifter, and it looks probably impossible to fit one on the M handlebar. It might just about work if if the shifter were cut down a little. . . probably the grip area would end up too cramped. But a Flamingo handlebar would do the job.