I am running 7/8" CNC master cylinder for the rear wheels along with 3/4" CNC cutters and a seperate 3/4" master cylinder for the front brakes. I use -3AN braided brake lines and 3/16" hard lines, I would run the hard lines on the frame as much as you can then covert over to S/S braided lines to your wheels once it leaves the frame, never missed a beat since. As far as the residual valve goes, I never used them and I don't think you will ever need them and the springs? I dunno what they are for anyways and it seems to do fine without them. At last, the balance bar IMO is not necessary for the woods, you would want to control your front and rear brakes separately because you do not want your front wheels to lock up at all when backing down a hill, I only use the front brakes to help the going downhill part and if I need to use both front and rear brakes, I just turn my foot sideways and push on both pedals and control the difference by pressing on the front brake with my foot and the rear with my heel of the same foot, it always work for me and it never failed on me yet. If you are going to ride your buggy on the street alot and then yes, I would have the balance bar instead of adding another pedal.