Great idea if it can be implemented I would attend one at every event I went to.
Do we think much of the idea of filling tanks inside small blast boxes?
Turn up at the station, connect up, put bottle safely in blast box, fill, wait, fill, wait, remove bottle?
Even if the blast box is big enough for a whole marker and bottle to fit in?
Sorry if I've thread jacked but any safety ideas must be good and lets face it we've all seen people crouched over bottles or bottles pointed up in the air.
Just an idea