Nothing like that - I hope. My AD-8 started off with Vislero flat LiPo's and an SLR2 mount. Then, when it became necessary to carry an HDMI converter around for the NEX and the GH2 I added another storey to accommodate it. This all meant that the camera was getting really close to the ground. Plus, I was not that happy about the MK FC tendency to allow the camera to lean in the direction of travel during extended sideways flight. The Picloc 3X was out so I decided to try one with the PH AV200 and ordered the 360 kit as well.
However, all the MR stuff to date has been done solo i.e. without a camera operator, which means that the pan facility is not required. Although it is all wired up for a quick change to 3-axis with a second operator, up till now the pan axis has been locked down and disconnected. That is why I don't know how it performs. But, as I mentioned, I don't expect anything great out of it.
For a start, the magnetometer is useless because, without placing PL out on a long pole to the side, it is never going to be far enough from the magnetism of the servos to be unaffected and has to be disabled in Toolz. So, the pan axis will be relying solely on gyros to keep the heading - and that means it will drift. Secondly, the Pan servo supplied with the AV200 is slow as hell. By the time it catches up the operator will have already moved the camera round.
In all probability I will be doing a few jobs in a couple of weeks using a camera operator. I'll let you know then what I think about the pan axis.