Hehe…Thanks for the order Jerry! I’ll get that shipped out to ya’ asap. A gallon will cover 4-5 hours easy. I use a cheap Bostich pancake compressor (around 90 bucks on Amazon), and it works perfectly fine. You’ll want to set your PSI to 20 and then make your adjustments between air and coolant (doesn’t take too long) If you have a finicky regulator on your compressor, it might take a few minutes to get it to stay at 20 PSI. I plan on upgrading my regulator eventually. If you have any questions, problems, or issues whatsoever, don’t hesitate to shoot me a message!