Another rider running latex and Velox rim strips. No problems. Mine lose ~10 lbs. overnight. I wouldn't like a pump that I had to pull off the valve. I've had several tubes ruined by pumping on the road with mini-pumps until I got my Road Morph G, usually from the too-enthusiastic pumping of friends. And many more butyl tubes fail at the valve for no apparent reason. The valve is definitely a weak spot. New pump. Specialized Air Tool Comp is the best I've used so far. Not that expensive and should last you 20 years.