modelingmonkey,
I don't have an Aztec airbrush but have read about some people not liking them and also read about QC issues with that product.
The Badger 150 is a great airbrush and I have used one for years with great success, I replaced the needle and head assembly with the XF and can now spray the German nightfighter style mottles and scribble camouflage patterns with ease.
I also have the Badger 100G but rarely use it because the 150 with the XF head and needle can almost perform as well as the 100G.
The 100G would be ideal for spraying the scribble camouflage on 1/72 scale models and for doing post-shading.
I would like to join a nightfighter GB but can't at this time because my work table is full of projects that need to get finished. In a few weeks I should be ready to join this GB.
My list of nightfighter kits are:
Special Hobby 3-seat Me 262
Revell Ar 240
Heller Me 262B
Hobbycraft Ar 234N
DML Me 1101N
Revell He 219
Tamiya He 219
ProModeler Ta 154
ProModeler Bf 110G
Italeri Bf 110G
Revell Bf 110G
Tamiya Gekko
Hasegawa Ar 234N
Revell Me 262B
Matrixone