maybe the testing showed that the 8-14 would fail in rebuild but the 2-6 where small enough that would pass. or that the 8-14 where used in "serious business"

maybe the testing showed that the 8-14 would fail in rebuild but the 2-6 where small enough that would pass. or that the 8-14 where used in "serious business" where you could not fake your way around and the smaller ones for consumers or smaller firms would not notice or could not cause bigger harm.