Boom! Winner, winner, chicken dinner. The military O-2, Push pull slightly de-rated engines from Cessna. Also the Cessna 336, fixed gear and the 337 with trike retracts. I have been fortunate enough to have flown all 3 versions. New super mods can make this old bird high altitude, turboed and fast for a private twin. The push pull configuration eliminates almost all torque and P-factor problems of a normal twin, more than one "Mixmaster" met an early demise because the pilot did not recognize soon enough that the rear engine was dead. I believe Royal made a scale kit with the lovely dual boom configuration...."quite similar to the P-38." Thanks for your interest JonnyS. wallace.tharp