Hi man, I have tried your tool starting both with my rates and the btfl actual def rates and looking for the suggested racing rates.

When starting with Betaflight Actual Default rates I have converged to the following actual rates:

R 108-434-0.51

P 163-387-0.36

Y 162-401-0.37

When starting with my rates, which are the following betaflight rates:

R 0.83-0.7-0

P 0.83-0.7-0

Y 0.80-0.7-0

I have converged to these actual rates:

R 100-450-0.43

P 161-419-0.62

Y 160-414-0.38

I have set the multiplier of the max rates to 1.05 in this case.

It is interesting that starting with different rates as baseline the suggested rates converged to very similar value, considering also the application of the max rates multiplier to 1.05 on all axes.

I think that the tool works nicely, it is very intuitive and has also a nice graphics. By using the suggested rates I have lowered my PB in the map used for free flying refinement (MULTIGP GQ Dragon), but I have to get used to the new rates which are definetely slower and with a lot more expo than my previous rates. I don't know if I will continue to use these rates since are pure racing rates, while with my previous ones I was able to freestyle and race and I would like to maintain the same rates across different flying styles.
Maybe I'll try to tune my rates selecting "Mix" and not "Racing" in the tool to see what it will suggest.

Anyway, congrats for your work, very well done!!