Hey, thank you! Well, yeah I started to draw more accurate and precise...Ou, by the way I drew it using just four standard brushes, it was interesting to see how can I work without custom brushes..So, my conclusion is that the round brushes are best!
Thanks for the good comment! Yes, I wanted to make some quick, light-armored unit, which specialized on air targets. For land targets it has a machine-gun, not so powerful as the guns above, but it good for defense