Below are some pictures of the valves from my '24 Elkhart. The first valve has begun to stick and the inside of the casing is shiny brass in a few spots dark everywhere else (couldn't get it to show up in a picture). I can force air past all three valves if i seal the bell and blow pretty hard. The local repair shop quoted me 220 plus tax for a replate of the valves and casings, refit, compression test, and alignment. That sounds lower than other quotes i have heard on here. The tech said he would have to send it off and it would take 4-6 weeks. Any thoughts?