You are still missing what it is doing that I need fixed.
Do this, change the servo speed on all three servos to 9, that is very slow so you will be able to watch as thing happen. Then turn the ch 6 all the way to one side, and throw ch7 to tilt the PBG. Now click the ch 8 to the full back position, this will open the doors and deploy the PBG at the same time. As the the doors start opening, the PBG starts coming down, and turning and tilting all at the same time. If you pull the ch8 switch to you every thing starts moveing all at the same time, which makes the PBG go through the sides of the plane. The reasion is because all the motion is tied to switch position. All the deferant motions should be tied to the location of the next part in the linking.
There should not be any movement side to side or up and down, unless the doors are full open and the turrent is fully deployed, so that when the turrent starts moveing down, there would not be any side or down movement untill the turrent reaches the bottom of travel. Like wise, the turrent could not start moveing up untill the PBG was fully stowed, then the turrent would be able to move up, but the doors could not star to close untill the turrent was all the way up.