Here's my current battery of high pressure air. Started out with the 90CI Ninja, added a Airhog 18cuft(I think 18), Then was given/loaned the two 88cuft'ers. Got another Airhog tank and then acquired the 444 cuft 4500 steel tank. I usually use the small tanks for field trips and tethering, the 88's for shooting around the house and tuning and the 444....well, not sure just how I'm going to put it to work. I did refill my Ninja for tethering and filled my guns a couple of times off of it. I've got the two 88's plumbed together for cascading. The best part, no charge on filling the small bottles and the two 88's. I think $30 on the 444cuft if and when that happens.
Jimmy