I understand you want a DIY post, but it is very easy. I found my best way to remove the inboard bolts was with two wrenches. When you remove the OEM arms, they will be 11¾" OC.

Before installing adjustable arms, take them apart and apply anti-seize compound on the threads. Reassemble and run both ends in until they bottom out. Then equally turn them out until you get 12" OC. I slightly tightened the lock nuts before assembling so I wouldn't accidently move the adjustment. Once tight on the car, I locked down the nuts with the ends parallel to each other.

Using the 12" OC measurement, at first I thought it was too much when I got the car off the stands. After I drove it around the block, the wheels look as I want them. Using a framing square to the driveway, the wheels are still slightly tilted in, but not noticable to the eye. I will leave it alone until I get an alignment one day.

James