Originally Posted by GLwagon

I visually watch until the hub hits a stop lock point or the rack assembly stops moving.
I watch the hubs first.
I'll then add +3 to +5 or lock tension.

I'll then dial down the dual rate D/R till I barely have enough or it isn't twitchy.

If I need it all, then Expo curves come in a little more.

This is provided you go through a check list in order...

Servo centered. (horn on & then sub trim adjusted)
Rack centered. (adjust the linkage not the servo)
Make the car go strait, by adjusting the last set of linkges.
Then set endpoints.