>is the same true for tunica, above 8:00 hits primarily the tunica.<
I think that was a question. Yes, if you LOT is 8, then stretching or hanging at 8 or above will mainly hit the tunica. 10 or better would assure dedicated stretch to the tunica.
>as far as tunica stretch is concerned, any idea of the potential of growth with it.<
I have no idea. It depends on your physiology, and the amount of stress you are able to apply to the tissues as they become stronger.
>do you think that targeting the 8:00 area for stretching would be effective or counterproductive so that both tunica and ligs are hit at the same time.<
No, I recommend concentrating on either ligs, or tunica, so that the stresses are dedicated, and not split. You will reach fatigue faster and create more deformation of the target area. Divide and conquer.