hi Ruud, imho it is sensable to take the advice given. A forum is a gold mine of info esp. this one. There are countless members in here who have been through the mill with set up and yes you may find a company nearer to you than wim who can do the job. But how long and much will it cost to find?
The advice is given as a sure fire way of achieveing your goal in the easiest quickest and cheapest way possible.
Couple of other things, there are numerous other settings other than camber that can effect tire ware, handeling, and your wallet. Only way to set them accurately is by a laser alignment machine and a full geometry set up.
In order to set up, the car must have bushes in good condition, steering idler with no wear and no broken springs.
Also consider the likelyhood of any suspension parts that may need changing in future, to pass an mot for instance, like leaking front shocks, any springs, or rear donut bushes, because any subsequent change in parts can alter the set again and need re doing. But only you can know how far you want to take this.
Personally i have changed all except front shocks and springs and still have a wandering issue.
Whatever you decide, give Tony a ring and have a chat, hes a smashing guy and will help where ever if can.
We must be due another wim meet by now surely... Anyone?