I bought a brass proportioning valve from kirban along with entire new system. Stainless brake lines, braided hoses, hydroboost, master cylinder, wheel cyinders. When I go to bleed, I cant get any fluid from rear brakes so I figure the proportioning valve is not centered. I try a couple of different methods that I read online and I cant get anything from rear...I end up getting so pissed off I take the entire pv off car because I figure that there is no pressure anywhere so the thing has to center itself but it wont. I tried to fins a picture of how the button looks when it is centered but cant find one. Can anybody give me a pointer about figuring this shit out. Thanks.