I tinkered with the heli again today. I must have lifted off, hovered for a few seconds, set it down, and then re-adjusted 15 times.
My ball link on my servo is as close to the spline as I can get it. All of the tail linkage feels nice and smooth too. I tried setting the heading hold gain to almost every setting possible, and even tried adjusting the delay setting on the gyro, in conjunction with the gain, but it still hunts.
I just don't get it. [

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It's not a bad hunt, it's perfectly flyable, as it only moved between 1/2 and 3/4 of an inch, but I expected to see a rock steady tail with this popular gyro.
Maybe this is as good, as I'm going to be able to get it?
I have the gyro mounted upside down, underneath, where the tail boom meets the frame......is this an ok way to mount it?