KSA leans on eye appeal and vintage, not mathematical perfection

Three or more graders under magnification is a deliberately expensive way to grade a card, and it only makes sense if you believe the thing being measured is partly a matter of judgement.

That belief is the whole positioning. Modern graders lean on measurement because measurement is repeatable and scales; a committee looking at eye appeal does not scale and does not promise the same answer twice. For vintage, where condition is uneven and the card's presence matters as much as its centering, that trade is often the right one.

It is the wrong one for modern chrome, where buyers expect a strict, measurable read and the population is large enough that small grade differences carry real money. Match the card to the method rather than picking a grader and hoping.