Hey guys I tried to look this up but couldn't get the answer I was looking for. On the MKIV TT it is stated in various threads that the master cylinder has a built in proportioning valve. Now I'm getting ready to start upgrading my brakes, tires, and wheels. I am trying to figure out how you guys are installing the proportioning valve. Let say for example i wanted to allow more pressure to my rear brakes. I am restricted to the pressure that the master cylinder is regulating to the rear brakes, correct? Do I need to block off the rear line output from the master cylinder and install the proportioning valve off the front brake output? If I do this would I be reducing the pressure from the master cylinder on the front output since it would be distributing to 4 brakes vs. 2 brakes?