Although first results have been very good I wouldn't mind someone telling me I'm doing it right and any ways I can improve with it, as I may have been too excited when John at H&G was explaining the method. I seem to remember DaaB managing to bottle carbonated bright beer with a standard bottling stick a while back.

I connected the gun and cornie up to the gas using a splitter running at about 10 psi, the beer was well chilled (5-10C) and was already quite carbonated, I connected the gun up to the black beer disconnect, pulled trigger and purged the line with beer into a 'vessel' and then pressed the gas release to purge oxygen out of the gas lines, then I bottled five or six bottles, letting the foam come out before capping them straightaway, popped a few bottles in the fridge for an hour, opened them and hey presto, bright carbonated beer, even with bubbles rising and everything....
the instructions recommend chilling the bottles befreo filling, I'll do this next time.
does the gun add more CO2 as the beer is going through it?