well i went to the range today, and it somewhat worked..... turns out i my backswing was really wrong and now you have corrected it with that drill. i used to be way open at the top, but not anymore, now it is nice and square at the top..... but even when i squared it or closed it at the top i would still hold it open at impact. the cupping of my right hand would open the face a bit so i just moved my right hand a bit stronger so that when i cup my hand it stays square and doesn't open.