Thanks, first rv and we are having a blast in it. Not planning on doing air brakes and it is on a p30 chassis, gas burner. The park break will not engage and when I put it in park, still wants to roll. The dealer we bought it from, has it right now and is repairing it. He has told me that it will take a sending unit and a switch. Which seems to go out on these. But being a older truck guy, I thought with the parking brake, it was tightening up the main line. Just wanted to check, since this is bigger than a truck or old car.