I recently got a few S30 pressure barrels with soda adaptors, as for unknown reasons, UK companies dont like shipping S30 bottles (bombs) to NI. I was wondering if theres a way to get a connector tubing, for either valve, that would allow me to top up a half drunk barrel with the CO2 from a priming one, would save some time and dosh on refills and be a lot handier. My spidey sense says it shouldnt be too difficult given the pretty modest pressures involved, but gas related product lines are always perniciously specific.