Hmmmm..... I compared JJ's run to my best run, and the differences are consistent throughout the run.
-------Marlin------JJ----Diff
60'----2.237----2.305----<.07>
330'---6.109----6.079-----.03
1/8----9.262----9.102-----.16
1000'-11.967---11.692-----.27
1/4---14.252---13.878-----.37
MPH---98.690--103.040-----4.35
Factoring out my 60' advantage, it's a tenth at each measuring point
Sounds like the consistent advantage of 2.5" mandrel bent pipes supports the consistent advantage proven between the slips!