Have been following this thread with a great deal of interest, and decided to have a go at my own set of controls.
I'm starting off with a simple double-engine throttle control. Then I hope to add Bow and Aft Thruster controls and a Rudder control at some point in the future.
I spend the weekend designing the throttle control in TurboCAD Deluxe, and then spent most of today starting construction.
Here is where I have got to...
In the next image, the bracket at the top of the picture doesn't look straight. That is intentional to compenstate for some skew on the potentiomer...
It is still quite rough at the moment. The wood is 9mm thick MDF, that I have left over from my UPS enclosure project.
The brass uprights their handles fitted, and also need cleaning.
The potentiometers need wiring up, once the BU0836 arrives.
And then once it's all wired up, calibrated, and testing, the top curve will be covered with some thin plastic, and a throttle legend (0%, 5%, 10%, 15%, etc.) will be printed to be stuck on top.