You can do a search on this thread for "MIXMASTER", it should come back with all my posts. I have posted most of the areas needing beefing up. In short:Landing gear block&formers,fire wall(use tri stock soaked in thin CA)& epoxy them in.Use 4/40 linkages,seal the hinge lines,no CA hinges-pin points or GP nylon (the hard white nylon ones with a pin that is flattened in the middle-can be de-hinged). If you dont want to solder,use 4/40 all threads & carbon tube.I glue(epoxy)the stab&screws on permanently to reduce the risk of coming loose in flight.I have balanced the elevator halves with lead shot on the leading edges of counter-balances underneath,just carve out some balsa,add the lead & balance & recover.If you seal the hinge gaps of the elevator you probably could skip the lead shot.Use servos of at least 60-85 oz. torque,I trust Hitec HS635 Karbonites-85Oz @ 6V.If you want to 3-D, the wing trailing edges need to be beveled to 45 deg to allow spoileron travel of 45-55 deg throw for harriers,walls.Also will have to get-into mixing big time for 3-D& the "Do". Elevator flap mix-with up-elev giving up spoilerons.(note that the radio mix; elev-flap might not allow enough spoileron travel at full mix(100%),might have to use another p-mix to elev-flap to achieve 45-50deg throw.I know it might sound like a lot, but if you can make these mods,you will have a plane that "kicks *****",it will be all up to you.