Yes, that was an early example. I mounted the magnets directly on to the joystick piece. After thinking about it for a while I decided to extend the shafts and mount the magnets where they will be more accessible. That way I can take care of all the mechanical elements first and once all that is done I can make and adjust the magnet mounts to suit.
I should mention by the way, that all the sensors will be Hall effect, hence the emphasis on the magnets.
Here are some pictures of the center mount joystick arrangement. The big almost vertical bolt will hold the joystick, the little bit of tube behind it is only used as a stop so the whole thing doesn't swing 360 degrees!
The first two show the joystick at what will be top-right and bottom-left.
Close-up of the assembly.
These last two pictures show the throttle assembly. Two throttles mounted side-by-side. The rod projecting forward will be used as a friction stop. There will be one per throttle and the little bit of plastic around the rod on the left holds eight magnets that provide the friction. The other end will obviously be connected to the throttles.
Before you know my workmanship too much please note that the mounts are temporary and only there so I can work out the dimensions and positioning. I imagine they will be quite sloppy in use the way they are.
You can probably see that the 'square' white plastic piece with five holes is important to me! I made a mould for it and can now make them from the plastic I mentioned earlier quite quickly. I put the ball bearings in to the piece when I make them so it's all held in place very tightly. The ball bearings can pop out if required too.