Don't hesitate to use the slab balsa provided for the tail feathers on this kit- you will need the weight back there to balance anyway. I built one (the 60 size) with a TT Pro 60 on the nose, and I still had to add about an ounce of lead in the tail to get her to balance. These are real easy planes to fly. Very smooth and predictable. If you haven't carved all the nose balsa yet, invest in one of those power planes from GP. They save time when there's a ton of carving to do is this kit has. I mounted my engine mount on the firewall prior to gluing on the balsa nose pieces to guarantee there was room for the mount. It was a tight fit using the supplied nylon GP mount.

Pilgrim