Definitely
What Lars said. I tried to get by with a Milwaukee 90 deg cordless electric on my -8 QB until I ran into a spot I could not get access even with that. Bought the best pnumatic right angle drill I could afford 15 years ago and it set me back ~ $250. I forget the brand, but I love it. It turns VERY fast compared to the Home Depot air drill I normally use, so perfect for aluminum. The threaded bits aren't cheap, and you won't need it every day, but when you need it you'll really need it. The single best tool purchase I've made.