Been thinking about it for a couple of years now and after reading some of the reviews on the GX line, ended up buying the GX-E-L2 from Amazon (the single battery one). Even though I'm probably going to do most of my filling in the basement with a dehumidifier running, I wanted the option of taking it out back for the longer shooting sessions so this should be perfect. I know the filter probably isn't the best, it is the little tampon type, so curious what others are using. I'm thinking of adding a second one at the end of the hose as I don't see it taking more than 2-3 minutes to fill any of my guns. TIA!