Have a look at this...
http://www.youtube.com/watch?v=VjNU7pQnwaI
I think the 360 trainer might have some merit for some people with specific stroke problems, but the "gravity cue" . . .
You be the judge.
Mr H
http://www.youtube.com/watch?v=VjNU7pQnwaI
I think the 360 trainer might have some merit for some people with specific stroke problems, but the "gravity cue" . . .

You be the judge.
Mr H