To follow up on my first response, the servo centering facility SVR1 which allows the RTH position to be adjusted has a maximum throw of 500us. This is sufficient to compensate for about 15-20° of negative tilt of the mounted PL. If the mounted PL is set at a greater negative angle than this the camera plate will not be able to come back to horizontal. It will be tilted forward slightly - perhaps 4-5°. This is sufficient though to return to a useful starting point if the cameraman gets disorientated.
The Start position can be set at whatever you want, either horizontal, in which case it will differ from the RTH position, or it can be set the same as the RTH position, tilted forwards. Note that all of this applies only to 360° servos with the PL mounted on the same plane as the camera plate. None of this applies to standard servos with the PL off-axis.
I have not yet flown the PL mounted on the PH 360 mount so I have no idea how it will perform yet. The PL mounted on the Copterworks heli is mounted on the same plane as the camera plate and is therefore subjected to the same attitude changes as the camera. It is not mounted on any absorbing material, gel or gyro pads yet. It is actually strapped on with a couple of bicycle inner tube rubber bands for now. The reason for this is that from past experience with the Picloc TRv3 and 2X series the PL's were going on and off the mount with alarming regularity and using up expensive, difficult to obtain gel at an unhealthy rate.
I have made only two test flights with the Copterworks mounted PL 3X so far. The first one was shown
HERE. The general response was immeasurably better than the 2X, even with the bench settings, but it obviously required further work for the most important axis - Roll. The Tilt axis has always worked remarkably well with Piclocs of all generations. The Pan is significantly better than before but still suffers from an annoying drift. For some reason the built-in magnetometer is not that helpful at all.
Some parameters were changed and a second test flight showed that the Roll axis was probably now too sensitive and was prime candidate for some slight oscillation of the roll axis in flight. At some point I will isolate the PL with gel or something to see whether or not vibrations are causing it to oscillate the Roll axis.
If you are doing all this with an electric powered heli/MR there is no particular need to isolate the PL but there is never any harm in doing so.
