That's the ticket..that's why I didn't want to bash Ritches, I know some people who love it, I've run the 10% sport fuel (won it at a fun fly) and it worked fine, just not readily available.

Point was, to keep an open mind to everything that may be causing you grief. You seem to have a handle on that aspect. And by all means try to re-adjust before switching fuels, but if you follow the instructions layed out in this thread and still have trouble, a simple fuel swap might be the answer.