Popped over to D1's place yesterday evening and tested his B500 setup, not bad even though that specific one doesn't qualify for this challenge (it was a B16 fitted with B20) - your tune on it wasn't all that bad - handled the way a car is meant to handle entering a corner at high speed.
I'll try and better my own time when I have a gap one evening.
correction ....K20 lol
i will build another a with a b16 and will revert back on the results. ( when i can get some time to play lol)