I'll start off with I'm a complete HPA noob, I've just bought a conversion kit for my TM MWS CQB Block 1 & hence have a small HPA tank now that I need to fill up, there are a couple local dive clubs near me and obviously I can fill it up at my next game but outside of that I'm thinking what is an easier way to fill it up, I have access to an absolute ton of Nitrogen (I own a Fibre Laser) so on hand I have around 1,000L of 300 bar Nitrogen, what would the implications of using nitrogen instead of CO2 in the HPA tank?