Ceegee, i am in the same place. That Harrier 90 sure does look like it would be fun to fly. I am actually in the process of building a CG Ultimate that i bought a Evolution 1.00 for. So I may try and stick with a 4 stroke that will work for that average 40 size. Seing as the 82 fits in the 72 space i may go with the 82, then if i get a bigger 4 stroke it can be a 1.20!!