What does this left-breaking stall tendencey mean to you? Just guessing, my first thought is of a flying surface alignment anomoly, not a problem with the VG's.
I'm not a simplistic-minded believer of all fast-talking VG salesman. But, I have found the VG-equipped "old"-wing A-1B to be more "solid" or "tight" on short final when at slow-speed and/or grossed-out than the un-VG-equipped version. My customers confer with me. So far, they have wanted VG's on 3 Husky's now, and whined when I couldn't get a set installed before hunting season last year.
However, in the interest of learning a thing or 2 or three, George and Mike, would you say more? Would you also say more about the 'new' wing bird? I read an earlier post from you of the niceties of the new wing, but I'd like to hear more if you have it.
I am not anti VG. I had them on two Super Cubs. On a Seneca, the VG's provided better elevator authority in the flare, and for several years I flew a VG equipped Baron out of a 2,500 foot strip.
On the old wing Husky, it needed 200 feet to take off and 350 feet to land. As I said previously, VG's took 25 feet off the landing distance. Given how out of balance the takeoff versus landing performance was, I was delighted to get the 25 foot benefit of the VG's.
I am embarrassed to say that while I did power on and off stalls after installing the VG's on the old wing Husky, I had never tested partial power stalls. When I did that, as I prepared to install VG's on the new wing Husky, I was shocked to learn that this generally docile plane had a mean streak ready to rear its head at a bad moment.
I brought my finding on the Husky List, and other folks confirmed it as well, with their own testing. Until I found this in our testing, I had never known about this flight characteristic with the VG's on the Husky, and you can imagine they didn't feature it in their advertising. As to rigging, our old wing Husky flew in trim, so I don't suspect rigging was the cause. If it were rigging, the same finding would not likely be reported by others as well.
I discussed this with the folks down at Fighter Combat International, when we were doing recurrent training in the Extra 300, and they think that the VG's allowed the stall to occur in a deeper stall, and thus the break. That is above my pay grade, but I know what I experienced and what others have also reported.
I don't have good data on the new wing Husky and VG's, except on one new wing plane that was deemed unsafe with VG's, but ultimately there was a rigging issue. I do note that Bob Hoff, a long time Husky dealer does not want to install VG's. Thomas Dietrich, who is Mr Husky in Switzerland, and constantly innovating mods for the Husky, doesn't use them on his "Snowbird," that he lands on skis up high in the Alps.
As far as your customer opinions, when you can't get into places without a fright, that are casual in a Cub, you want any advantage possible. I would ask them how thorough the flight testing they did was after installation? When I tested the VG's, and saw that the plane wouldn't break power off, just mush down, I thought we were good to go.
This is hard for me to say, because I like the Husky so much, but the old wing Husky is not a great Bush wheel plane. While it really performs on floats and skis, it is a fright going into short places. That is the reason we gave up and decided to build a Cub. However, the new wing Husky is a whole different plane, and brings the landing distance down to 200 feet - or equivalent to takeoff distance.
I don't believe Aviat realized what they were going to get beyond increasing the descent rate with flaps and improving the ailerons by increasing the roll rate and reducing adverse yaw. Nobody from the dealer or the factory told us about the reduction in approach speed (about 10 mph) and it was a great surprise when we figured it out. At first, we thought it was a fluke, but then my wife and I started consistently getting the short landings.
The real answer to your customers, is if they want a wheel plane to go into the shortest places, is get a new wing Husky or just stick with a Cub. If the plane will mostly be used on floats and skis, and occasional Bushwheel use, or the landing distances aren't so critical, then the old wing is fine. As to VG's, tell them to decide whether 25 feet on landing is important enough for them to roll it over on a partial power stall close to the ground.
George