Anyone ever had probelms buliding boost at above 7500 ft? Some times when I am up in the mountains i can't seem to bulid more than 3 or 4 lbs. When I come back down from the mountians everything comes back to normal... is this becuase the air is so much thinner at high elevation in coloado? search returned alot, but nothing really delt with this, always seemed to be something else...