same problem with front disc brake, had to add washer and fine adjust several times.
bike performed well in really bad windy conditions, great for sprinting on, some slight wear on knee joint however i already had tired knees before i started using it, perhaps i need to change gear more often.
handles well on corners, never felt i was falling off, had problems almost dropping the bike a couple of times.
I want to upgade the functional components, including frame (duel suspension), discs, seat post, shocks, tyres, handle bar grips. would like a guide on modifying / updating firmware and any links to software or source code would be appreciated.