hi all I havent posted on here for a couple of years but this week I got a onza, I have fitted my magura rim brakes I have also fitted the boosters but I would like to change to the 4 bolt mount so my questions are 1) do you have to different booster for these type of mounts 2) is there any 4 bolt mounts that are worth getting over others, I dont want to spend to much as il need some for the front and rear if links could be posted up that would be a great help. thanks mikey