Well I took the caliper apart and hit the brakes a little, and found a small leak, and the slider thing wasn't sliding very well. I already had the rebuld kits so I figured, what the heck. I rebuilt the caliper this afternoon, and it really wasn't that hard. I have it all back together, but I still have to bleed the lines AGAIN. I have an adjustable proportioning valve but I haven't plumbed it in yet. I was hoping i wouldn't have to. I haven't tried the brakes yet, but I have the feeling Im going to have to upgrade the master and put in that valve. From what I've read, you have to gut the stock proportioning valve to put in the new one. Is that right? Thanks for all the help.