I can state first hand that Maz does not have any kind of trickery stored within his wheel balancer!!
I had the pleasure of watching the master at work again today as he serviced my bike. At my request Maz removed the rear wheel to examine the bearings. Upon doing so it was apparent that they were the worse for wear and to demonstrate this he placed it on the balancer. What an awful noise, it had to be heard to be believed just how noisy the bearings were. When the wheel was on the bike you couldn't hear the noise for the sound of the belt etc.. Then after changing the bearing, not a sound!!
So, if you think your bearings are fine... think again, it might be worth a little trip to see Maz.
I'm about to set off on a trip to Croatia, so I'm glad I had mine checked