So I recently purchased a Wildcat MK3 compact in .25. I will be using the gun exclusively for squirrel hunting. I currently have a Yong Heng compressor and use it to direct fill my gun so it only runs just a few minutes so hopefully I will get a lot of life out of it. I would like to buy the smallest portable tank I could find so could use it in the field jut to top off the gun one or two times. I would like to find something that I could use the Yong Heng to fill.(Without running it for an hour). Also, it needs to fit in a small back pack. Does anybody make such a thing that's not crazy expensive? Can you guys point me in the right direction?