So 'peanut' size. Isn't that 12" ws. I have been told that a prop of 30 to 40% of ws is desirable. I am leaning more to 30 % . The bigger that number the more torque effect you are going to have on you plane. It looks like you have a 6" prop on this little thing, and in my limited experience I would say that that is too much for these little wings to handle.
Respectfully, Mitch