The Prop Valve I bought from LRS (Ford Racing, but says Wilwood under the sticker) less than a year ago is leaking around the fitting that holds the knob in place. I assume there is an O-ring, gasket or packing gland of sorts inside. Has anyone here ever had this problem and managed to rebuilt the valve ? I just looked at Summit and a new one listed for around $31 and when I added it to my cart the price magically jumped about 7 bucks ! What's up with that ?