Let me also reiterate that while my bench is calibrated to flow 592cfm in range 6 that is to do so at 25"....if I were deliberately trying to mislead I would base my calculations off of that info....AT THE VERY LEAST...and not bother with the .997 correction factor for flow capacity when flowing at 28".....while not a lot it would gain me some 'flow' but if the numbers aren't genuine I really don't see the point....in the past I had even posted some results that seemed positive BEFORE I verified as I was a bit happy to have them....only to realize why, at that time the gain occurred, and once that issue was corrected and the results proven not actual I deleted that post....I have since ACTUALLY gotten to that point and maybe even a but more but at that time the post was not accurate and was therefore immediately removed....