Hi, well the relay valve is on the way. Bought 50' of hose and 20 ferruels, and it's time to move on to the next problem. I but in new bags on the rear with plates, and new air lines from the valves. When the bus is aired up it sits level from side to side as it should. When I shut the bus off the passenger side deflates in about 20 minutes while the driver side takes a few hours. I've checked the fittings, lines, and the bag to mounting surfaces with soapy water and cannot find any leaks. What am I missing?