I don’t have the DVD, but I have been having success using variations CTE over several months.
What I have learned from others and several threads is that the initial lining up to the CTE-line is to get you in a starting position behind the CB – especially your forward foot. If you shot from that stance, you would hit the OB sending it at around a 30 degree cut angle. In order to shoot other cut angles, you must move off of that stance before the tip offset and pivoting.
This can be a small distance for say a 25 and 35 degrees cut angle; and a larger distance for a “thin” 90 degree cut angle.
To aid with that movement to the side, the secondary features “quarters” or “A. B, C and 1/8 etc.) on the OB are used to align with. In order to get the outermost eye aligned (thanks Mike), you need to shift your eye, head, body and rear foot until the edge of the CB is aimed at the appropriate quarters or “letters” mentioned above. This achieves a new stance off of the CTE line from which, you raise your cue and bridge hand to the table and in your natural stroking position, you align the tip of your cue ½ tip to the side of the center of the CB and then pivot to the center of the CB, stroke (wherever the cue is aimed at) and shoot.
I find that the moving away from the CTE line to the side to see the line from the edge of the CB to the secondary points is like rotating your stance with the CB at its axis – so the shift to the side is not parallel to the original CTE line but is a slight angle away from CTE line that can increase the more to the side that you need to in order to see the secondary point/s of aim.
When the OB is far down table, the angle decreases for the same cut angle for the OB will appear to be a smaller diameter, but yet all of the references from CTE to the secondary points of aim are all on the OB though proportionally smaller with smaller shifts and angles. That is why CTE doesn’t have to adjust the bridge distance farther back from the CB to decrease the included angle necessary to hit the OB down table.
If you read all of the posts in this thread, you will get other pointers from those that have the DVD.
I hope that this helps.