cobbled brake system

I like the feel of the 15/16 but cannot say if it will move enough fluid to properly activate the rear brakes. Others will chime in.
The 15/16 takes a bit more pedal travel than some like, but because of that, it is easy to modulate. The travel is not excessive, and the pedal never gets near the floor even when you hammer them on. And it's easy to set the line-loc just where you like it.