I started with the 37/33 you liked, and after checking temps, maintained 38/34. I tried 32 in the rear on my last (8th) run, but wasn't able to discern any difference on just one run. I'll be experimenting more with that.
I didn't have as much tire roll-over as you -- it stopped at the first mold line, but that may have been due to general lack of heat, thus grip.
I don't recall if you said how much toe you have in the rear, but I am at 0. I should probably try an eight next time, if I'm still on the 295s.