I was treated today by my Fedex man delivering my pnwaero.com VG kit today. Their very-well-constructed kit has the proposed position but I was interested in opinions on the placement so I will toss it out there for debate:

How far back is the best spot for VGs on a KF7?

I will post the results of my testing after installation based upon their recommendations.

My current 'numbers':
Clean: 47
1/2 flap: 44
full flap: 40 (well maybe 40.5)