Thanks for the link Kurt. I will check them all out.
I understand the exhaust issue!! We had an ARB installed in the FJ, and took it to Moab. We discovered it wasn't working when needed. Compressor came on, built pressure and turned off as it should, but locker wasn't engaging. We found out later that the line fell onto the exhaust, burned it in half, melted the ends perfectly, sealing them up.
Here is a video of us discovering the locker wasn't working, but had no clue as to why yet. This was on the 2013 Explorer Forum meet, and 3 other EF members on this trail day.