A couple days ago I got a GX CS2. I bought it from GX and used their 10% off code to get it for about $250. I like filling from my bottle which I fill using my Yong Heng. But it won't last forever and isn't very portable. I've taken the bottle to the range but it's pretty big. Anyway, I am not sure exactly what I will do with this so I got the normal CS2 to have 120V and vehicle power to use it. But I also wanted to be able to power it with my 18V Milwaukee tool batteries. So I bought a 18 to 12 V 240W step down converter from Amazon with a Milwaukee battery dock. I was a little worried it was only 240W but I done a dead head test and filled a gun with it and it seems to work fine. I thought about integrating it with the CS2 but decided, at least for now, to just have this little power unit I can clip to and use without modifying the compressor.