The gears are to be changed by a push/pull handle on the starboard side and a "speed wheel" for the engine throttle on the port side.
Below is the rear bearing which will carry the rotating shaft of the speedwheel throttle control.
It is bolted solidly to the cabin roof as this shaft is sometimes swung on as the cabin is entered.
Further along the cabin ceiling the throttle control shaft will through a small hole drilled in the cabin framing.
We noticed that the shaft would pass directly under a light positioned over the table cupboard so this was adjusted by filling in the hole intended for the light with a blank which can be seen just left of the roof prism frame. The light has been moved a few inches left where the wire can now be seen hanging out of it's ceiling hole. Hardly a gross error and it will be easy to hide when painting proceeds.
At the front end of the engine speed control shaft is this worm drive which will convert the rotational shaft movement to a vertical push and pull.. It is mounted directly over the engine speed lever on the governor.