I agree Tony.

Re-calibrating the radar, absolutely special tools needed.

But simple tracking does not seem to need the radar re-setting unless pre-existing problems are already apparent. It only seems to be a risk management exercise. (similar to disconnecting battery for any airbag system work, or re-new all common rail pipes if they have been undone)

You only have to measure the amount of movement in the wishbone- and rear axle bushes of a current Golf as well the degradation in shore hardness within a very short space of time/ miles/temperature to realise the huge spread the radar logic has to deal with. Much more than the few minutes of adjustment the average alignment seems to cover.

A bit of common sense needs to be used I think. If huge amounts of adjustment is needed when alignment is done, it might be wise to check radar or infrared alignment.