Just want to thank everyone for their help. Being in school, it's (hopefully) going to be a while before I get another engine or make another purchase this big. This forum and others have been a big help.

Minn, you're absolutely right, and I think the YS is the engine for me. Really what I want is a four stroke with performance like my 120AX, with more mid range power and less of a need for throttle range. I got spoiled with my AX pretty quickly, and don't want to give up anything without return.

Since it should be a while before I buy another engine (like the OS 120 four stroke for the Super Stearman I want next) I can't let $20 or $30 influence me as much as it was. Better to get what I want and be happy with it. YS engines just went up in price this week, but it's just something I'll have to deal with.