The Aztek I use to use had the same nozzle attached to it for 2 years (the tan coloured one), was pulled apart only once to be cleaned, and sprayed everything, enamels, acrylics and laquers.
Diggeraone, DO NOT run any laquers through your Aztek or else it WILL die a loathsome death. Thats what killed mine after a month of laquerage.
Second thing about Azteks, DO NOT backflush them, or else you WILL end up with paint all through the air/paint mech, and wind up having the same problem most have had.
Other than that, mine worked a treat for more models than I can remember.
They ain't that bad, and I'd gladly buy another if the price here was cheaper