My experience is with a Acutrac 22 Pro. I set the mast vertical, this is a critical step. A good tripod with adjustable legs is needed for this.
Then I set the Skew on the dish and mount it to the tripod. I also have an Align-A-Site system, where I set the Elevation and the Azimuth. I generally add about 0-19 degrees to compensate for magnetic deviation de[ending on where in the country I am.
I only hook-the primary coax cable from the 1000.2 to the Acutrac. I set the 22KHz tone on to insure the LNBF selected is the 119 one. I swing the Azimuth for best signal, then the Elevation. I never tweak the Skew. I go run the Switch Check to make sure I am on the correct satellite. If I am off (110 or 129), I change the Align-A-site 9 or 10 degrees and aim again.
I guess with the Acutrac III, you can display all three satellites which is a visual confirmation of being on the correct satellite.