Yeah-- I agree with Robin again. My advice is to buy a good double action AB and learn how to use it. I've been modeling since 1959, and I wish somebody had given me that same advice back in the 60's when I was just getting into airbrushing. By the time you spend money on several "good" single action brushes, you'll wish you'd just started with a double action in the first place. There are plenty of inexpensive (relatively speaking) double actions out there that do a great job. By the time you buy a single action, use it for a few models, and wonder why you cant get the same feathered edge and "mottling" and fine lines that other modelers do, you'll wish you'd have bought a double action. True, they are more difficult to learn how to use, but once you master them through practice, you'll be amazed at the results and what you can do with them. But remember, like any fine instrument, they need to be kept clean and serviceable, cleaning them after each use, and storing them properly to avoid damage. You don't by a Ferrari to park it in a junkyard and never change the oil--at least you shouldn't if you expect it to drive properly!