Another timing curve question

Mattax, thanks for all the timing info and data. I'll need to chew on that for a while...
I could (when getting all the timing in really quick, if not actually at idle) screw down the adjustment in the vac can so it's basically locked out, then start putting a little back in until ping starts to return...
It's also possible to limit the amount of advance by modifying the stops or the arm, too, 15 may be too much for a fast or locked-out curve as you mention, but even 10 or less would help with part-throttle efficiency.