Ahoy sgtmick64. I bought an aztek 470 twelve years ago, the one in the nice wooden box with all the accessories. I tried it out for several weeks and couldn't get it to match the results of my Paasche VL so I put it on the shelf and went back to my Paasche. I still use my VL, but I've also purchased several different airbrushes over the years, mostly Badgers, including their Patriot 105.
I was searching the internet the other day and came across this video:
https://www.youtube.com/watch?v=iovWaWo80pE
After viewing it, I took my Aztek off the shelf and gave it another try. Viola! This time, after understanding how the little wheel in the back works, I got very good results. I also liked the way I could clean it and change colors rapidly.
I've been using it quite a bit lately and am quite pleased with it, especially with acrylics which I've always had problems with. My point is that you've got to learn how to use the equipment and, as Dirty Harry says, "A man's got to know his limitations" (applies to equipment too).
Back to the internet. I found a new testor's aztek on ebay and bought it for $30. They're out there to find if you're patient.
In addition to knowing the limitations, you've also got to practice, practice, and practice.