[oats]

Are there particular colors you are having problems with. This is the last Airbrush you should be having problems spraying createx with. It's a
0.5mm Airbrush and alot more forgiving with thicker paint. However sometimes createx is a little too thick. Usually diluting it to the consistancy of milk is a good starting point. Also depending on the age it's never a bad thing to strain your paint. It makes an amazing difference when there are no blobs. Pretty much only 2 things will give you bubbles in the cup besides a crack in the nozzle or somewhere else.
1- The nozzle cap is loose. Sometimes a litle beeswax on the threads helps this.
2-You have a blob particle in the nozzle itself which will create the same effect as holding your finger over the front of the brush and blocking the air from coming out-this will cause the paint in the cup to bubble and not pass through the nozzle.
Also what are you painting-If tee's I usually don't shoot below 40psi and mix the paint alittle thicker.

Paper or canvas the consistancy of milk and about 20psi is a good start.
That Revolution is nothing to snear at-My pics of the Stable were done 80 percent with it.
Hope this helps. Good luck!
Almost forgot-DO NOT mix paint in those little PAPER 3oz bathroom cups. The paper seperates and clogs the nozzle-Look for the little 3oz plastic ones.