I'm pretty sure the RGS has exactly the same engine as my 63 SR, 9 to one CR and 357 cam.
I don't see it doing any better with a 24 tooth than this SR would.
From Orabanda's dyno results, the lower tuned bikes actually showed a teensy bit more grunt 3k to 5 k than the HHC motor. I think the higher tuned bikes like mine are, if anything, less suited to overgearing. They need to rev to get that extra power and the overgearing goes against that.
Now I'm just going by my own results with this single bike and by the numbers, but I think the idea of a much more powerful version on the A10 engine in the RGS is a bit of a myth.
Berger, with your Shooting Star, what is your new overall ratio vs old?
Glen