no worries basil.
i respect tat u r the 1st 1 to confirm with him.
also,the test u mention is to balance the wheels,normally there r 2 types of balance.
1 is the 1 u mention, the other type which is better is after they balance the rims n tyres, the rims n tyres will b bolt back on n they will ride a small machine to do the on-wheel balancing.
tis test is better as it can detect dents which r not visible to the naked eyes