I've been corresponding with Rocky Mountain Parabolics in Vancouver, B.C. and I've decided to go with their Torrel front disk brake conversion kit. Along with the disk brakes, I'm going to add a dual circuit brake line system and I'm trying to determine which master cylinder to use.

I've heard varying opinions on the subject. Some say that any master cylinder will work, while others say that with the drum brake MC "residual pressure" and the varying pressures and volumes required between disks and drums, only a specific "disk brake MC" should be used. There's also the boosted/non-boosted debate.

I can see some logic in some of the arguments, but I'm still confused. Can anyone put this to bed?

Thanks,
Mark