Rabies - With regards to HPA bottles, as long as you have the right kinda bottle, and a prefixed screw in reg, they are very simple to setup. all you really need to do i locktite the bottle to the reg. (NOT THE MARKER THOUGH!!)
And once thats done, it would be exactly the same to put it on or take it off as a pin valved CO2 bottle.
Joff - um.. i might be about, as might tiny. not sure. Thats why academy is better, cos all the experts (ill call them that to boost their egos) come together.
But , which day is that? the sun? ill see what i can do.