There is a hole on the top center of the steering rack (somewhat hidden below the bundle of fuel lines, etc) into which you can insert a thin rod (4 or 5 mm or so) to locate an indent in the rack for centering purposes. (I used a #1 phillips screwdriver)
When I received my car, with the steering wheel centered and the wheels pointing straight ahead, the rack was substantially off center. So I first re-centered the rack, then while keeping the rack centered, set the wheels as parallel to the frame and as equal left to right as I could measure (mudguards removed helped), then set the track with a track gauge, then re-centered the steering wheel via re-positioning the steering universal joint. Whew!
After a test drive, I did a final re-centering of the steering wheel by re-adjusting the tie rods, plus 2 flats on one end and minus 2 flats on the other.
The reason I went to all that trouble was not so much how it drove, but rather that the left mudguard was just able to touch the exhaust on full lock.
Last edited by Bitsobrits; 04/11/18 06:08 PM.