NMS169, I have a Balsa U.S.A. Swizzle Stick with a Saito .56 in it. It is a great little plane, but it will not do an outside loop. It is fairly over-powered with the .56. I imagine it would be very over-powered with a .61 two-stroke. I'd finally had it with the bent wire tail skid, and replaced it with a tail wheel controlled by a mini-servo mounted on the bottom of the fuse and Y'ed into the rudder channel. This is a very easy plane to fly. Mine has ailerons.