Vg's havs a local air flow directional dependency(can be as much as90° difference from 1 to the next)tuft testing is needed for proper application. VG will allow steeper change of angle with out loosing attached flow. Consider a 3D Printer to produce in house. (I see a short ROIwith the volume of VG'S needed as well as the capability to produce scale models for testing)
Are you running Road Trains? Single 53'? Triple 20' ? I assume you have many configurations.
The Canadian artical is interesting, I am still reading it (120pg).
1st gen cummins 91.5 dodge d250 ,16cm turbo housing ehxsost manafulld wrap, Aero Tonto
best tank: distance 649gps mi 24.04 mpg 27.011usg
Best mpg : 29.3mpg
97mi 3.311usg 7/27/16