I've just got standard ballraced Futaba servos in mine, 4mm threaded pushrods with CF tube over that and compressed with nuts, MVVS 40 APC 9x7, looked at putting my GRRT in, but was harder than 4 bolts so i didnt bother.
My Outlaw is almost as fast, but has just 3003's on rather large surfaces. Maybe we dont get flutter in Cornwall?

? lol