The purpose of this opening is so that you can adjust the needle without removing the handle in a single action airbrush. Most experienced airbrush artists will actually take their handle off so that they can deal with clogging issues without delay. So the choice is yours as to whether or not you want the handle on or off of your airbrush while you are creating airbrush art. The great part is there is no pain involved. Real tattoos come with pain and is one of the reason that some people do not get them. So using airbrush art to create a tattoo gives people the chance to have realistic tattoos without the pain. Real tattoos are permanent and you are stuck with what ever you get. Once you understand the different options that are available and the benefits of each option you will be better able to determine which airbrush you need for which projects. For the paint you have an internal mix or an external mix. The internal mix is when the air and the paint both mix inside of the airbrush. Kent Lind will show you how to create cool caricatures in this approximately 70 minute video titled, How to Airbrush Caricatures. This video will go into all the details that you will need to know to create your own airbrush art caricatures. These designs are great on t-shirts, canvas and if you really want you can put then on your car. These videos are created by expert airbrush artists that will show you exactly what you need to know. Air Brush Action offers up a good beginner's video called AirBrush Action Introduction to Airbrush. This video comes on DVD and will help you to learn about airbrush art. You will get 1 hour and 30 minutes of techniques and principles of airbrushing that will apply to all types of airbrush art. With myspace you can create a profile that is dedicated to you as an artist. Upload pictures of your work and take the time to create a couple of videos as well. Create the videos so that they show you in the act of working on your airbrush art. Make sure to use good lighting so that your videos truly capture the art of what you are airbrushing.