If you're using metal braces, you want to avoid having a continuous loop of metal, as this will act as a radio signal reflector, potential glitch problem. Sullivan has a kit using kevlar thread, everything in tension all around. I have used the airfoil shaped birch sticks from my LHS, made up little aluminum connector straps at either end. Finish the sticks with monokote and they look nice, aerodynamically clean. I shy away from adding anything metal to the tail, because a little bit of tailweight takes a lot of noseweight to balance. The Funtana 90 ARF uses carbon fiber rods simply embedded in the wood (and glued), bracing on the bottom sides of the stabs only.