[47hook]

Over a couple of months of sitting mine will drop a few pounds. Check your owner's manual for the trailair ctrpt, it will tell you what to do to correct small leaks at the slip fittings. The ones that the plastic air lines fit in. IIRC, you air the system to 100 psi to help seat the fittings (don't drive with them at that pressure). Again, IIRC, the air lines slip into the fittings and to release them you simply slide a collar back which releases the line. If there are any nicks in the area they are seating this could cause a leak. Get a very sharp knife and cut straight across to remove the damaged section and make sure you make a square cut. Then just reseat the line. I'd first try the high pressure treatment.

My pinbox doesn't really leak, either. Check to see if the valve stem/core isn't leaking (also check the 2 for the ctrpt system). If you have the right little valve core remover you can check for tightness or just put a few drops of water on the valve to check for leaks.

Good luck, and as always call DRV or Lippert/TrailAir for help.