Bernie,
I understand. Since you were a marine, you know how to make stuff fit. Cut that center window you used in the video lower, so you can shoot kneeling.
I guess you tried to shoot halfway standing. This is not a real stable position unless you use Asbells s..t seat. I know that we smaller guys can not shoot comfortably out of those higher of the ground windows kneeling without stretching real bad, which make our lower bodies unstable.
I know why I have 3 double bull blinds and finally the Matrix, where you can adjust that...
The Ameristep blind is not bad, but you increase your chances with those slight modifications and make it easier on you to get off a perfect shot.
The netting is not required for turkeys, they tolerate the black hole.
By the way, how far were your shots?
Another thing for good training is, to always only shoot one arrow at your intended target.
Your second arrow is automatically corrected after the first. Gives you a wrong impression about your ability,since only your first one counts.
Seeing in your videos, the first one always seemed to hit left....