Thanks indeed for the quick reply. I'll update later this morning, and report the results. Interestingly, after resetting the idle mixture setting, I have performed 3 cold starts without a problem. Too early to be sure of anything, but encouraging nonetheless.
The dealer was willing to take a look with their computer for $161, with no promise of being able to help. Every time I use the GS-911, the satisfaction of being able to "cut the strings" from the dealership is hugely satisfying, both personally, and financially!
Thank you.