Originally Posted by Jon
Wrong its M30X 0.75 done loads.
Have to wonder why using original end plugs, extend the number of threads with a better fit.
Will look into that option as well - I just didn't know how fiddly it was to machine the valve part on the factory tube so you could take it off and put back on. Or should I assume you mean it should just be machined for permanent fixment and be non-removable (outside of de-pressurizing and servicing of course)?