An update on my VG installation and testing.

As the instructions describe, they were placed 4" back. Here are the results:

Clean stall went from 47 to 45.
1/2 flaps went from 44 to 43.
Full flaps remained at 40.

I felt no increase in stability anywhere in flight and the stalls were much more sudden with very little warning. The stall break was MUCH more aggressive. At full flaps, the elevator was unable to produce enough pitch so a small amount of power was added to get it to a break. And break it did!

I powered up and top speed is down by about 15!

Needless to say, I took them right off.

My assumption is that I have them way too far forward at 4". They are soaking currently in MEK to get the carpet tape off the bottoms for the next round.