i have the same set up on the 800e trekker,only problem i have with it is position hold, it some times goes into a toilet bowl effect if engaged wile the heli is drifting slowly .No problem if engaged in a still hover.
IM WONDER IF I WASTED MY MONEY WITH SKOOKUM ROBOTICS SK720. AS A STANDARD FLIGHT CONTROLLER IT WORKS GREAT. BUT I SPENT THE EXTRA MONEY FOR BAIL OUT AND GPS FUNCTIONS
check your firmware and update if necessary ,your right about vibration it does have to be very low,but i have been very happy with mine, bail out and rth works great.
