I have never had an air shock before and picked up my RT last thursday. When I got home the air pressure read 0 in the shock. I aired it up to 65 lbs and the next morning it read 20 psi. Do you have to air the shock often to keep it up or is it leaking. How often does everyone have to air their shocks? Also I cannot get the cruise to set but about once out of 50 tries. Is this commmon?