This one has me thinkin a bit.... You def shouldn't have to have your gain that high at all...
I am using mini vbar on my E7, E6, and full size vbar on my N5c... I used the Micro beast on a mini protos, stretched mini protos, logo 400, Furion 6, and a Trex 700E v2... I had great success with this unit all all the helis I have used it on.
How much of a tail kick are you getting when you climb out? Is it a small one or does it completely blow out? I know there was some reports of a small tail kick using the jive controller.... My tail moves about an inch or so on straight climb outs, but it is rock solid through hurricanes and any tail first maneuvers even at full collective and full cyclic....
-Steve