My wife and I have been dreaming of purchasing a new BH3160 this fall. A big stumbling block has been that we currently own (and owe on) a Class C. This weekend we saw a used BH 3185. Not quite the unit of our dreams, but comes close. Big issue is that it doesn't have an auto leveling system and only one A/C unit. It looks like we could do something with our trade, something they seem hesitant to do when we talk about purchasing a new model. Not sure why I'm hesitating. Anyone upgrade your front hydraulic lift and power rear jacks to full auto leveling? How did it go and was it costly? I know I can get an a/c unit, but was told the additional unit could not have a thermostat, just a fan switch. Anyone add a second a/c that wasn't prewired??? The dealer we're talking with sells used units only. Everything on his lot appears super clean. I guess what makes me nervous is that I feel like I know everything about the 3160 and nothing really about the build specs of the 3185. All comments appreciated!!