I put some of that gobbledegook into real units:
If model was real it would be a truck 196" long (short box), 208" long (baseline), 219" long (long box) x 72" wide x 66" high.
Baseline bed height (I think it should be called bed rail height because the bed floor height does not change) = 18"; low rails are 10"; high rails are 26" above the floor.
Bed floor is 28" off the ground thus making bed rails 38", 46", and 54" off the ground.
Baseline bed length is 81" (6.75'); short bed is 69" (5.75'); long bed is 92" (7.7').
I have to admit, I don't completely comprehend the figures that purport to show flow vectors. The units and proportions don't make sense to me- is the tailgate a foot thick or what? The flow patterns don't all follow the "rotating box vortice" that in the past I was led to believe all pickups had. The oil tracers all look the same to me as well.