Since bar 12 (at least the one Tim diagrammed here) is straight triplets, you should abandon the shuffle for that measure.
Generally, use the shuffle for rhythm and then drop it if you're dong single-note fills.
Hope this helps.
Thanks, too, for the heads-up on the typo in "Scaling the Heights." I'm beginning to wonder if I've ever written anything without mistakes!

Peace[/quote]
Yeah, I'm terrible at explaining or writing about rhythm. I find myself vamping around on this stuff until it sounds right. That's always my default position in these discussions -- play around with it until it sounds bluesy. How's that for precision? :-/
Isn't that what Beethoven used to put in his scores?