I took care of my landing gear by just using some fiberglass cloth and some epoxy. Hardly added any weight, and when I crashed my funtana, the landing gear area was the only thing left in tact

As for the tail, I used a piece of spruce instead of the joiner wire, and used 2 carbon fiber pins drilled into the elevator through the spruce joiner. Not much more weight then the joiner wire, and it didn't flex at. I ended up crashing mine due to the elevator push rod failing during a flat spin. The push rod flexed under the load and wouldn't pull out. So just make sure you replace those small pushrods with 4-40 or carbon fiber.