Due to the fact that the nearest dive shop to me is about 3hrs of driving away I have been considering finding a way to fill my own tanks. One of the options that I have come across is to find a filter unit for a scuba compressor and then pair that with a compressor for pcp airguns that reaches pressures in line with or higher than scuba tanks. I know that this would probably take a while to fill a tank, but I will only need to fill one or two at a time. I was wondering how feasible something like this sounds to all you people that have more knowledge about this than I do.