I don't know why but when I edit my post with my phone, my post gets wiped out. Anyway...
You also want to keep scan angles low for graphics. When DT-40 specs say they can do 40K, it's at 8 degrees. That is a pretty damn small image. With my DT-40s tuned in well, I can hit about 15 degrees at 30K. After that, there is slight degradation. Keep in mind, I am also using very narrow mirrors. Since I project mainly abstract images and limited graphics, I am pushing them to 20 degrees but complex graphics and block text start to suffer e.g. rounded corners and such.
I would advise not tuning your scanners unless you have to. To check, display the ILDA test pattern at 30K and scale back the image size to where the test pattern looks near perfect. If it's around 12~18 degrees at 30K, you're in the butter zone. If it's 10 degrees or less, you could tweak the tuning a bit. If you can't get a perfect image at 30K, they are out of tune. Tuning is not only tedious, it takes a bit of time. I have tuned my fair share of scanners and to tune in a set that has gone off the rails, it still takes me a good 45 minutes. My first time tuning in scanners, I was at it for several hours. Surprisingly, what gets on your nerves is the noise when tuning the ILDA test pattern in. The ticking chatter from the scanners is enough to make your head explode. At least, that's how it is for me. It's definitely not a pleasant sound! Anyone who has tuned a set of G-120s knows what I'm talking about. I have to wad up toilet paper for my ears or use earplugs. To follow up with what Brad said, you don't want to do it if you don't have to. It's a pain in the ass.
If you're the smartest person in the room, then you're in the wrong room.