Tracking is clearly important and easy enough to do at home with a simple frame.
I didn't realise at the time, but cars with steering damper blades have more castor than the later cars with MMC steering bearings.
So fitting Mulfab bearings to my Roadster and removing the damper blades was transformational.
Whereas fitting Mulfab bearings to my 2016 to replace the MMC original bearings had much less of an effect.