Test drive day. Happy.
Weighed it with me in it and a quarter tank of fuel; 7450 lbs. GVWR is 10,500 lbs so lots of load to spare. Gauge on propane tank needed a bounce or two as it now reads above empty.
Still need to get it out onto a highway to see how it behaves with the air dam, but trucks coming opposite me at 50 mph were hard to feel with any buffeting. Time will tell. AC still cold.