If this has been discussed before I couldn't find it in the search function. I would like to call on everyone that has, or has had, VGs to give a report of their model, how far from the leading edge they positioned their VG, and what change they had. This may provide some empirical data to help others in the decision making process. I'm gonna do it, I just don't want to go through the flight testing process if it's already been done by others.