Having splashed 'oot and bought myself a secondhand 300bar bottle I want to refit the restrictor screw in the Hornet filler-probe. It's basically an allen headed screw that screws down inside the probe restricting the airflow when you gas up from a pressurised cylinder.

I removed it to make my life easier with the Hills pump, problem is I don't know how far to screw it back in.


Any ideas gratefully recieved...
(I might regret saying that !)