John, does the Proctor EIII have bracing cables running internally (from side to side) or just along the sides (and top and bottom)? Also I can't quite picture why a 5-point fitting would be needed.

BTW, I think I might finally get around to using that cowling you so kindly sent me several years ago when I was working on the EIII. It looks like there might be a DrI in my future.