This was posted over at RCG, the OP crezzee was not not interested in starting another discussion here but I think he came up with a brilliant idea for a simple gimbal mount that many would be interested in here.
See thread here>>
The question is will his mount work in APM code since it uses a V-tail mix on the gimbal??
Possibly the mount could be modified to use a standard gimbal mix by moving the tube and servo.