Each new combination valve I would get after warrantying it out would eventually leak in six months. I decided to put in a Wilwood proportioning valve and change the brake lines out from the master cylinder. Anyways, I have not been able to find a brake line adapter to go from the rear brake line to the Wilwood. The rear brake line is 9/16 - 18 flare 1/4 inch tube. The Wilwood has a 1/8 NPT. It came with an adapter that was too small on the flare side. So my friend chopped up the combination valve and welded the adapter to the combo valve piece. It worked out pretty well but he kind of messed up the threads. So it started leaking after a few days. So do I have to go to a junkyard and repeat the cutting welding thing to make another adapter? Or has someone done this before and found an adapter? My other option would be to yank out the brake line and put a smaller fitting on it after cutting off the 9/16.