Haven't taken Lutton's class. I wasn't trying to directly compare. Was the picture shown previously from Lutton's??
no, they were just pictures I pulled when I googled thumbs forward grip. They just show a good example of a proper grip and how canted your support hand should be before wrapping around the front strap.
There are multiple pictures on the TDSA website of students during their classes showing their before and after grips if you want to see some directly from his class.