Installed my seelevel gauges in my host mammoth today. Seems to be working great. Was able to use the existing wires. Next upgrade will be rear view camera.
I installed the SeeLevel system in my AF811 back in 2011. I LOVE the system. The tanks are all accessible and I used existing wiring. It takes a bit of reading to understand how to use the existing wires.
The fresh tank was accessible through the front cabover step. The other tanks were accessible through the tank dump access door.