I am doing this as well, but one thing I was thinking about adding is one way valves to the hot and cold lines before the faucet. This is an idea I picked up from
http://www.modmyrv.com. I have experienced the issue they mention where you have just a second or two of either hot or cold water after opening the quick valve again on another rig I had. Might be work considering, sure is an easy thing to do! I really like this push button valve too! Much nicer than the typical lever types I usually see!
-Mike & Heidi
97 Roadtrek 170P "Taj Ma Trek"
http://vantramps.blogspot.com