Am planning to have SMB install their penthouse top on my van in the near future. Afterward, I would like to install a rooftop RV air conditioner on it. I am not real familiar with the details of the top, so would appreciate any opinions as to feasibility. The AC's only weigh about 100 lb. so it seems like it should work, but I have never seen one on a SMB penthouse. Thanks. Stosh.