I'm using Hi-Tec BB servos too, I think they're 322s but anyway they work fine. I also used the Carbon Fiber/split rods for the elevator and so far so good. I don't do power-on dives but i really crank it up and do high speed spins and snaps,not a hint of flutter. I don't have enough elevator throw for harriers and will probably need to move the CG aft a bit too but I'm not very skilled at Harriers anyway. If you follow the pictures the assembly is pretty straight forward and I believe the supplied hardware is decent. I don't remember if this plane had EZ connectors but if so I always replace them with either clevises or Z bends just as a personal preference. I think you will really enjoy this plane but let me know if you find a way to protect the covering. It really tears easily when flying and it can cause severe trim changes.

Enjoy,
~Jay