Hi Bob. Good tip...yup...tried it both ways...more and less chain wrap. Didn't affect upshifting in back while in the big front ring. Good tip as suspected like you did that amount of chain wrap with some affect to overall chain tension maybe a contributor...but no noticable difference.
Btw, I received the dashboard genie from Taiwan for mounting my Cateye to the new FSA Kwing handlebar. A very nice piece and glad I found it versus purchasing the reported to be more flexy FSA version. Your design is rock solid and elegantly designed....thanks.