I'll throw in my 2 cents here. I build practically all bf109s. For the past year, I'm been using a single action, gravity fed, external feed Paasche H. I can do passable 1/32 and maybe some easier (not all) 1/48 but I wouldn't try 1/72 mottles. I did a 109e desert camo (splotches) with masks in 1/72 but spent several hours cutting out the mask on paper.
I just bought a Badger 100 (internal mix, gravity fed, double action) and from the first minute, I can tell, I won't fear 1/72 mottles. I can even do those wavy net-like lines camo. I still have a lot of practice to hone in my skills with this Badger but as for the argument that skills is more important than tool...I'm sure a mediocre driver in a Corvette can out drag the best driver in a Corolla (sorry Toyota) any day.