Originally Posted by chaadster

Wow. Knowing what was affecting performance was NOT the purpose of the study. I don't know how else to explain it to you, and whether a causal relationship was assumed doesn't matter, because they have a testing system to quantify transmitted vibration, which WAS the point of the study.

Your point is simply not germane to the study; it's a condition that you are reading into the study, because it was not part of the study's objectives, which makes it your problem, not one of the study.