Ice man have you ever herd of SKOREPA" brand wooden props? Dick Hanson likes them. I am going to try a few.
http://www.escomposites.com/wooden_props.htm
What muffler are you using and are you running a pump? Any problems getting the carb to meter an instant spool? I am debating on motors--was thinking about the OS1.6FX but the ST2300 is so much less. Are you running one of the newer ST2300's?