What a marvelous build journal.
I don't think I would worry too much about the ejector pulls. They look really good as is. Once he canopy is added, this will be even harder to see. Just my 2 cents worth...
As far as air brushing goes, I think you will do good with this too. The trick to air brushing is thinning the paint down enough. After a while you will get an eye for doing this. It seems that it will look too thin, but it sprays the best this way. I usually spray my paints at a 50 / 50 mix of thinner to paint. Air pressure is another biggie. Not too much, and not too little. 15 to 30 PSI works the best for me. It also matters if you are painting a large area or something small like Luftwaffe mottling.
If you have any old models to use as something to practice on first, that will help too.
I have no doubts that you will pick up on it quickly... and you will start using the air brush more and more.
The office looks fantastic, as does the crew. I'll be looking forward to seeing your next installment.