Thanks for the reply Han2007!
The 120AX will be my largest 2-stroke and on my other 3D planes (smaller than the baby) I use a Saito with a wide prop like a 14x4W or 16x4W. Does the 16x8 APC you mention give good 3D hover type performance or is it better for pattern?
One other note of advice, you will want to go with Great Planes Adjustable Engine Mount for 1.20-1.80 size engines. It's a little longer then its counterparts and you'll need the reach, there's a lot of room in the cowl. (check out post #206 and 217 in this thread on page 9).
I checked out this and it makes sense.
Lastly, if you haven't checked out Tom's "Smaller Bunnies" thread there is also some good info there as well.
Good stuff here too, thanks.
Thanks again,
Al