I was wondering if I needed to buy a regulator for an air compressor that already has one. I received a cheap Master airbrush and mini compressor as a gift a couple years ago. Even with all the problems I was having, I still greatly enjoyed it. This year I received a Central Pneumatic 3 gallon pancake air compressor that has an internal pressure gauge and a regulator built in. I am really excited to use pneumatic tools AND have a better compressor for airbrushing. After doing some research, I found many sources on recommended parts and setups. Most were the same: connector>gauge>regulator>filter>adapter>airbrush hose>airbrush. But I couldn't find whether a built in regulator would be good or not. I am willing to buy the necessary parts for my airbrushing but I don't want to buy redundant parts if I don't have to. Can someone help?