Make up your own wooden or steel jig and set it yourself. It doesn't need high precision optical equipment - if you look at the specification it will say something like 2mm +- 1.5mm. You could measure that accurately enough with a school ruler.
I have never seen a garage set steering tracking who appeared to have any clue how to do it properly. They never understand the importance of adjusting each side equally.
Also:
1) the car has to have been brought to a gentle stop in a forward direction - not slammed to a halt.
2) Jack up each wheel, check for rim run-out, and position any run-out at the top or bottom.
3) Car has to be averagely loaded - tracking varies slightly with number of passengers.
For a proper set up they should spin the wheel from lock to lock to establish the centre position. Check the steering wheel is centralised. Lock it in the centre position, then check that each wheel aligns straight in relation to the rear wheels. Then check tracking as above, adjusting evenly each side.
Once done, monitor the tyre wear with a gauge to pick up early signs of misalignment.
It's all easy DIY stuff, but they try and con you that it's rocket science.
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