The real story behind the strakes/vortex generators on the legacy Hornet, was that upon reaching some of their early phase inspections, the jets were showing heavy fatigue in the vertical stabs that wasn't expected. They figured out (probably through said camera footage) during the EI that the LEX's were sending really strong vortices right into the stabs. The initial fix to get the jets flying again was the addition of some cleats at the bottom of the stabs. Still around on every Legacy jet I've flown, but it ended up only transferring the location of the fatigue. They finally got smart and added the strakes and the problem was minimized.
Anyway, cool pics, the Growler is a neat jet!