Has anyone here ever built up a roadie single with a coaster brake? I have an old Reynolds 531 frame I built up as a singlespeed commuter with front brake, but I'm having reservations about trusting all my braking to one thin cable. The clean look with only one cable really appeals to me, so I'm exploring coaster brakes as a backup stopping method. Any tales of performance, weight, friction, mechanical woes etc. are appreciated.

Cheers!