Orac: I believe the nav had to undo a panel on the side of the cockpit to gain access to the control rods.
What followed depended on how adventuresome he felt.
It was a little like the Venom3 where the power/manual control for the ailerons was between the two seats.
If the nav got fed up with aeros you would suddenly find yourself in manual halfway round a roll, with the stick damn near solid.