Don't know anyone who can service them (at least 2 people have looked with no luck), but the manual can be found here if it's any help viewtopic.php?t=153141
Great info much appreciated - noted the 80 psi pressure and warning given, this is about the pressure mine was dropping too. Also noted
pressure maintained with pump connected overnight - might be the Schrader valve (hoping).
Risse Racing can service them. If its not working, they said they can repair them 1/2 of the time; it just depends on what is broken. Mine is on the way back from them right now and cost $90 with return shipping inside US.