I am not very happy with the high approach speed of the Kitfox and would love to try and find a solution; it is the only thing less than great about the airplane.
I have a Model 4 w/ a 912s now, but I previously had a 3 with a 582. I did install VG's on the 3. I used the ones from Landshorter.com and located them a 10% of the chord which is known as a common success point on most airfoils. I did not see anything noticable after the installation. But remember that is a totally different airfoil. I also did not put any on the horizontal and I think that could help.
On the 4, I tend to run out of elevator at slow speeds. I did try taping the gap as suggested by many forums about many different airplanes, but the problem persisted. I then removed the tape.
I am very interested in trying a few more things to get this solved. 4 mph would be a great win in my opinion.
I am once again thinking about snow falling and installing my skis. It could be a good winter for that up here.
Just letting you know people are reading and listening,
Kelly