Sorry about reviving this thread, but I have one other question about the combination valve in my K5. In the chassis manual it tells me to hold the metering pin in while bleeding the lines. There does not seem to be any resistance to pushing the pin in. In fact, the pin seems like it is always in the "in" position. It does however have some spring loading when I pull it out. How does the metering pin act on your rigs? The only reason I ask is that I am having difficulty getting a firm peddle now that I've replaced both my master cylinder and booster. Any help is appreciated.