Well, I am back on the AC for excavator again. My super smart genius engineering uncle says I should just shell out big bucks for red dot roof unit, (2,895.00 just for parts), but Coleman has RV roof air units on sale, one called "coleman polar cub", fully self contained, for lil over 500.00. Its a low profile design, lil under 10,000 BTUs of cooling pulling 43 amps. I have located generator already for 900.00, and have perfect place on excavator to mount it. I wouldnt have compressor mounted on engine, robbing any horsepower, and condensor is in roof unit, so no problems heating up engine radiator dealing with that. Not to mention how easy and quick it would be to install. I thinks I may just have to do it, that sumbitch is melting me down! I think I will also tint windows at same time. You all got any input? Is I gone goofy or what? well,,,goofier randyp