i did my bmw 3 series rack last year with the brother in law, thank fork for having the use of a car lift and air tools !!
it was still an utter bitch to do mind you, as you say getting the rack from the stearing arm is sheer hell!
when you have it all done you really need to align it pre road trip, its easy to do with 2 people and a length of string
simply tie the string round the back wheel and pull it from the center of the rear wheel all the way to the front and you want the string touching the front and rear of the front tyre, repeat over and over on each side making sure you roll the card forward and back each time to settle things in.
that way you have a reasonable straight ahead track so you get minimal wear on the drive to the tracking center