Again, thanks for all the replies.
I've already been watching the Barry Stark videos, having watched 1-20 and a few other selected topics. Yes, I am aware that moving the bridge hand forward requires also moving the rear hand forward. Thanks for the tip.
In spite of what the video may show, my vision center is *just* to the left of the bridge of my nose, hence, when I am lined up correctly, the cue is somewhere between my left eye and the center of my nose, slightly closer to my nose than my eye. At least that's when I line up correctly. If you look back at the first video I posted with two shots showing me straight on from the first, the first shot spun the CB, but the cue was aligned slightly RIGHT of my nose. The second shot, which returned straight back to the cue and had no spin, the cue is aligned just left of my nose, which is where it should be based on my vision center. So, more work to ensure I'm more consistently lined up with my vision center.
Fran, I had started out with a stance even more open than in these videos. I have slowly started to move my left foot forward. Currently my left foot is about 1/2 a foot (literally!) forward of my right foot. This seems comfortable and affords a good view of the shot yet (most shots) allows my swing to be unobstructed by my torso. On some shots I notice my practice swings touch my chest. These are usually on cut shots, which tells me my stance position is wrong, and I am compensating by adjusting my shoulder and arm. In such cases I try to stand up, back up, then re-approach the table. I'll try moving my left foot forward incrementally until I've gone too far. I just hope I can determine that point.
I have also noticed that when lining up my shot, it really helps me to step back from the shot, then step FORWARD into the shot, keeping my eye totally focused on the OB (actually, the CB "ghost"), never looking at the CB until I have positioned my feet. This has helped a whole bunch. I am not yet practiced enough to just position my feet and get down; the longer view from a step away from the table, then stepping forward, really helps. Sometimes this is difficult to envision on cut shots, which is why sometimes my chest is in the way.
One thing I continue to grapple with is my current nemesis shot, a 45-degree cut where the OB is about 1-2" away from the long rail and CB is in the middle of the table. I almost always hit these too thick because I have a tendency to look at the OB, rather than the position of the ghost. I am relatively sure it's not because of throw. When I miss thick I notice it's because my contact point is too thick. This happens on both sides of the table.
But this problem is aim and positioning related, and I don't think it's stance, or stroke related. I simply need to hit a whole bunch more of these to ensure I step into these shots aligned more correctly.
The feedback I am receiving here is invaluable, most of which is validating what I am finding on my own. I am using resources such as videos, Mark Wilson's book, and what I read here to apply these concepts to my physique and physical limitations. Now I understand why Mark says it takes 10,000 hours!!!!