CORRECTION....(to my previous side note comment on post#20).....and with apologies to MasterAirscrew. the MA prop I had on my engine was a 12-9 and not 12-6. So it was an unfair comparison with APC. Now I think I will try the MA 12-9 since 9600 rpm may be in the optimum power range for this engine and has plenty of pitch.
I will let you know, Submikester and others, how it goes.