Ok so i have been using the 550 for a few yrs now and its working fine but recently the Highside knob on the manifold leaks refer when i use it but stops if i fiddle with it.

I imagine i need to replace/rebuild the valves?? so do they have a replacement or is it as simple as taking them apart and replacing some O-rings?

anybody who has done this walk me through the procedure, thanks

oh and i need yet another hanger hook, arghh..i hope they get a different type soon..

i have my DC 1250s to use in the short term so not worried! :P