At a familiar track, only about a mile and a half long, the R7s were good for a full second over PZeros.
Set my new personal best by 1.01 second.
Also won my race class (ST2) on Saturday (started 4th overall finished third overall), took the overall race pole on Sunday out of 27 big/small bore cars (finished 5th overall after I ran out of fuel on the final lap, doh!), and set a new track record for NASA TT2 at this track by 1.5 seconds.
Took a while and some very skeptical tire pressure adjustments to make the R7s really work but I think I have a pretty good handle on them now.
And best of all, there were 6 people in my race and TT class each day so I was able to bank a whole set of Hoosiers for free in contingency for the weekend
Not sure if I will order R7s or A7s yet.