The flags on the mast are a nice touch, I later added my radio channel as a yellow banner. These were cut from paper printed from my ink jet printer. Be sure to coat them with a clear coat of some type, even a few drops of water can caused the ink to run.  I used thin strips of styrene for the cross piece. This proved too weak for every day use and I kept breaking it.  I plan to replace it with a piece of wire.