I have owned thee RK's with factory air shocks. It's pretty much a given that they will slowly leak air. Not a big deal, weekly check your fluids, tires and shocks.
well, its not that big of a deal I suppose, just seems like an air tight system such as air shocks should be, well, air tight. Ill try soapy water to see if its a connector.
Some of them will leak at the fittings. Put air in them and spray some soapy water on the fittings and look for the leak. It will usually show itself with bubbles. If you have a leak at a fitting just remove the line trim a little off and reattach it, that usually will fix it
Easiest fix is to get a couple of Shrader valves at NAPA, install one on each shock and throw the air line away. I thought adjusting the air at each shock would be a pain but they will hold air for months now.