Hi, I have had a rear magura julie for five months and it still wont bite properly. Me and my friend have tried all sorts to stop it slipping but nothing has worked. So far we have tried boiling water, Disk brake cleaner, wet and dry paper and dragging it to get it hot. None of these tecniuques have worked so we are now asking you guys! Any help would be appreciated because I am sick of falling on my arse! Cheers, Andrew