Comparison of DA85 on greeves (per Reza on QQ 101" Yak thread):
://www.rcmodelaviator.com/Videos/QQ-Yak%20101.wmvPerformance looks good.
Results were:
"As for the results on Greeves, I think QQ was getting 6380-6400 on a new DA85 and 26x12. This is on his first set of pipe(prototype). I don't know about the latest ones."
Not sure what the KS1090 setup would have spun the 26x12 at first run as 28x10 was 6450.