The black tape under the hatches contains lead weights to bring them down on their return as there is no reverse drive here.
Here is a close up of the lower crane drive system. As only the white part at the top turns I made a shaft to run up through and connect to it. The drive gear has been glued on to the bottom end and will connect to the motor.
With regards to the motor, I am using a modified servo. I've spent the afternoon modifying two servos by removing their stops to allow them to continuously rotate. Details follow when they are working.
The white box below this contains the R/X and when the deck is fitted it will be at it's highest point for better reception.
I've just noticed that the Hook wire will also be travelling up through this pipe so I hope it doesn't get tangle up.
ken