Any twin boom airplane can be made into a model rocket with two or three mid mounted canted motors. Pusher planes are good candidates too. It is just a matter of making them look good with room for a parachute or two and some no good nose weight. You might get some burn on a drag tail with flame fin action but don't let that stop you. For bombers twin tails are nice, as are outboard pod motors in nacelles, but only if you are so inclined to such a thing. Find an airplane you like and start a mindsim. Any shape up front can be molded with heavy epoxy clay. Be creative, have fun, use up all the old spare rocket parts you have lying around. It is not that hard, just follow the basic rules and you will be fine.