Power steering can cause wear similar to tracking being out.
Do you turn the car on full lock on a regular basis. I used to live in a location where I would drive into my road and hook it round in one motion to face out the way I had entered.
A few months of this and the outer edges were wearing as if the tracking was out. Tracking and tyre pressure was checked regularly.
If the front wishbone bushes are worn this will allow the wheels to turn out under braking as the weight of the car is biased to the front.
I was having a Full Geo done and when I took it out to check, it would be spot on until the brakes were applied, then it would be pants.
The car was put back on the guages and it would be out. Lifting the car with the wheels free and then dropping it down and re-checking...all was spot on again.
The bushes were within the correct tollerance when checked but they were still alowing the wheels to move out. New wishbones fitted and a full geo re-done...sorted.
A full geometric, properly done is well worth it
