I have a FR 3/4 rack (but no safari windows). No wind noise @80kpm with nothing on the rack.
Have used it only once since put it on the car a few weeks ago; carrying the following on a 2 night camp in Vic high country:
tent (in it's bag) (32kg); 20lt water container (20kg); 2 maxtrax (7kg); a wolf pack pro box (@15kg), small shovel (3kg); axe (3kg)
So all up about 80kg of stuff on the roof + 40kg for the rack.
Of course a bit of wind noise with above stuff on (to be expected) but absolutely no issue with the rack whatsoever.
At 1964mm lenght the 3/4 FR is almost 300mm longer than the Rhino 3/4 rack - or more corrdctlt stated - HALF RACK.
I have positioned my FR as far to the rear as possible (so that the rear 2 legs snug up against the rear of the gutter). See photo.
Then, you see that the front of the rack is very close to where the rear of the safari windows would be. (see photo)
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