I have had the Gaahleri swallowtail airbrush since June 2024. I too bought it based on the review by Barbatos Rex. This is my experence.
When I received the airbrush it would not blow air in first stage. When you pulled the trigger it would immediately start spraying paint instead of just air coming out. I contacted Gaahleri and the determined the "Needle Chucking Guide" was the problem and quickly sent me a replacement and that took care of the problem. They said the collar on the needle chucking guide probably had slid out of position due to rough handling during shipping.
The gun sprays very good. I have sprayed with the fan cap. I did spray one car model with it using enamel paint and it did fine. But, I do agree with Nacho Z. It does not a even fan spray. That being said I have not set down with it and really put the fan cap through a good test. I was pleased with the way it sprayed the one car I did use it on because I was able to spray the whole car quicker.
But, after 3 months of using the Swallowtail the Needle Chucking Guide is starting to give me problems again. It started doing the same thing it was doing when I received it. That is not blowing just air when you first pull the trigger. Since I know now what causes it I can quickly remove the needle chucking quide and put the collar back into position. But, it keeps happening.
I actually contacted Gaahleri today to see if they have a solution to the problem.
Again, the airbrush sprays very good. I mostly use the 0.3 nozzle. Atomization is very good. And, again, I have used the fan cap very little.
Also, the airbrush is easy to clean because of the large opening where the cup screws on.