Trackace DIY Wheel Aligment

[allanallen]

Or you could use the 'string box' method which will cost you even less and be just as accurate!

Just to clear up the misconception, the steering wheel being Central has absolutely nothing to do with correct tracking. The rack should be centralised when tracked up and the steering wheel removed and re-positioned to suit.
Oh and tyre monkeys with tracking gauges and laser beams generally don't have an f-ing clue about car suspension/steering geometry I'm afraid.