What luck, I went into my local hobby store on my lunch brake today and they had one last excelleron 50, not only that but I ran into a guy who sold me a nib OS FS-91 for $120. My question is will this engine work out in this plane or will it up the wing loading too much. Does this plane require lead in the nose to get it to balance out anyways? This will be my first quality engine so I'm really hoping I can get it to work out.