Easy to adjust if you have double adjustable upper or lower control arms, a little more difficult if you don't since you have to unbolt the CAs, adjust and bolt them back up and check again, but still a driveway mechanic job.
One thing to remember, extending the uppers lengthens the wheelbase and raises the pinion so it can cause some interference with the trackbar, gas tank, shocks, etc. You may not have any issues but its always better to check to make sure that you aren't banging anything after adjusting the angle by cycling the suspension.
Also, try to make sure you are adjusting each side by the exact same amount. 2 turns left side, 2 turns right side. Measure the length of each CA before and after to be sure you are adjusting by the same amount on each side. (if you're properly aligned they may not be exactly the same length in any case, and thats ok as long as the axle is square to the frame, and tension on the mounts is equal)
I have double adjustable uppers and lowers, so if I extend the uppers I shorten the lowers a little to compensate, and I never have to remove the arms to do it, just loosen the jam nuts, adjust the arm, and tighten them back up.
Or you can take it back to Evan. He's a great guy and can probably do it in about 30 min.
Savvy 3" lift, Currie Anti-rock swaybar, Nth Degree Tummy Tucker, Oil Pan Skid, Auto Trans Skid. 35x12.5 BFGs. Rockcrusher diff covers. Hanson Offroad front bumper. Besrk rear bumper/tire carrier. Metalcloak fenders/rockers/corners. Grizzly lockers, 4.88 gears. Superwinch EPi 9.0