I had a Menz 21x10 Std on the Sukhoi for a while before switching to a Menz 22x10 Std.
The 22x10 seemed to pull harder on take-off, climb, and verticals.
The 22x10 is a lot quieter too...less rpm!
I would like to see a torque curve for this engine.
I suspect that the max power(torque) is in the mid 6000's rpm.
Anyway the Menz 22x10 Std works well for me on this airplane and someday I'll try a muffled can or a tuned can.
So little time, so little money and so many things to do!
Good Luck
John