Apparently the Ketschker turn has been around for several years in Europe. I emailed Steve Schwarz, the Agility Nerd, a link to my second session and he replied that the Ketschker is used primarily to tighten up jump wraps. His advice was to not use two obstacles to train it as that might end up diluting the cue to wrap. Also he did a post in his blog on April 11th about jump wraps, and one of the methods he covered was the Ketschker.
Here is a video that demonstrates a lot of wrapping with the Ketschker:
I broke my ankle Saturday evening, so I won't be able to do any more work on this fascinating maneuver (or any other agility) for at least eight weeks. I'm hoping to really work on Belle's directionals and her service dog skills ;-) Additionally, I want to re-commit myself to my weight loss goal for the NADAC Championships in October. If I don't curb my fork, I'll end up 20 pounds heavier by the time the cast comes off. Wish me luck.