I don't know what tank antennas were used as stunt blades in the original trilogy or what they were made of but since this is for a fan film I would think one would rather use what's best for a stunt blade as opposed to what was used in the OT... which IMHO, is not what's best. In the last movie, Episode III, they used texalium wrapped carbon fiber tubes for blades... which again IMHO, is far superior to every single other material used for stunt blades in the other 5 films. Those are also the same type of stunt blades used in the popular fan made lightsaber duel "Ryan vs. Dorkman 2". Those blades are only about 1/2" in diameter, very light and very strong. Another alternative would be 1" dia. thick-walled polycarbonate tube. It's a bit heavier and has some flex but is it very strong and of course, rotoscoping will hide all flex. I personally have used 1" dia. thick-walled polycarbonate blades for stunt blades in a lightsaber duel fan film and they work quite well though they may seem a bit thick to some once rotoscoped.