Wolverine Storm regulator with braided line

Not working properly, it will pressurise when screwed onto the tank and the pressure will rise on the gauge but then will drop

down to nothing.  The regulator is still pressurised but the air is not coming through the quick disconnect or the line for some reason. 

I have stripped it down a few times and it will work ok sometimes after being stripped down,  the orings might need replaced but it could be something else.

£70 including postage and paypal fees

£60 including postage and paypal fees without the braided line

£50 including postage and paypal fees for just the bare unit without the line,connector and gauge

£12 including postage and paypal fees for just the braided line