If you do not add additional air tanks then your 1 inch impact is going to be limited to 1 lug nut every minute or two. I ditched air impacts a while ago as on onboard carry around tool. Lots of room with only 1 purpose.
The Milwaukee 18v fuel series 1/2" guns and the Dewalt 20v guns will do just about everything on these trucks. I have the big boy and the smaller 1/2" version. https://youtu.be/c1nd9PmCz_4
Thanks for the input! I'll have to investigate this route as well. The idea of onboard carrying is quite appealing. How often do you find you have to charge them if they've not been plugged in?