Originally Posted by Atomic Skull
Beenflying was telling me that he's had great success with this tail servo on a ZYX. I'm pretty much just using his 500 setup on mine with Mi servos on the cyclic and tail, YEP80A ESC etc.
Just have to remember to not run these at over 280hz no matter what Blue Arrow's website says (the listed specs used to say 280hz max, then it changed to 333hz for some reason and people started having problems trying to run them at that)
I noticed that someone wrote about that 280Hz limit on all the HK product pages, referencing some discussion on HeliFreak. Unless I've missed something with recent ZYX firmware, however, that 280Hz restriction is pretty onerous, since setting the tail to 250Hz will set your cyclic servos to analog.