Happy 4th of July! I have seen so much bad press I am wondering if anyone is using the Airmax gen 1 successfully as it came out of the box. I saw the unhappy thread on TAG and have not started using mine. I changed the oil to Royal Purple which I could buy on amazon. (how full do you fill oil on that visual indicator in the fill plug?) I increased the depth of the O-ring grove on the filter so that would not blow out. Any other must-do mods i must do before filling a tank with dry, oil-free air?