Ok so I went out and had a day full of playing on the twistiest road in the area with some SERIOUSLY fast riders. By SERIOUSLY fast, I mean holy oh my god jesus take the wheel fast, on track bikes riding on the street... that fast. I did slowly work up harder and harder until the rear end stepped out about 1 foot at 1/2 throttle leant fully over during a roll on. That's what I'd consider "my" limit and basically the bikes as well. I also found technique to back in the rocket repeatedly and consistently.
It is just plain humbling watching truly fast dudes on track bikes and the incredible pace they can set around tight turns. On the wider turns, I can pace them fine on the Rocket, but as soon as the radii get under 200 feet or so.... goooood byyyyye, not possible to keep up no matter what you do, its just not possible.
I can now firmly say, no need for rebuilt forks or aftermarket cartridges on the Roadster. I reckon there's maybe 5-10 guys who will ride their R3 the way I was riding today, and the AV-71 + 10w fork oil + .93kg spring + 100mm air gap worked perfectly, not a negative wiggle, chop, bump, squirm, nothing from the front, just tracked and stuck exactly as you'd want it to. Riding ranged from 150+ in 60 mph corners to 40+ in 20 mph corners, and the only undesirable thing was that slight rear end slide.
So, looking at that calculator I found, since now I know what the max attainable practical speed in a certain turn was here is the comparison to his calculator and reality:
What actually happened: stepped out rolling on from 40 mph in a 90ft radius curve (measured in google maps), his calculator it seems is a little conservative or my CoF was great than 1 (tires were boogering, so greater than 1 is quite possible):
After actually finding the R3R limits, I'll confidently say, there is NO cruiser out there that will out run an R3R ridden in anger through the twisties (provided you've done suspension work).