Hey Dave, it's been a minute. I'll jump in for sec with a quick thought. At first I was with @Mitch's zzz's. I mean, the trouble with over analyzing is that you better not skip over any contributing factor. It's easy to miss the target. Trying to pen out a calculated comparison seems in vain...
Any takers for used dust masks? Beggars shant be choosers. Barely any asbestos.
I hope I'm not too late to the party. I'm somewhat of an occasional pedestrian through this mill.