Huh!! Those graphics are interesting!! It seems like the 069 (always acclaimed as one of the best for Picco engines), gives similar power as the others at low-mid revs, but then doesn't deliver at high revs, so what's the advantage??
I'm currently using the 053 and it seems to work well all-arround. Maybe I can just change clutch bells and/or exaust headers (longer-shorter) to get the right power band for each track...
What do you think??