Hi Paul,
I've been working on my potentiometer and rebuilt it so that it now has a range over the full %k of the pot. It can read from 3.4 ohms to 5.1k ohms. Using gears was the only way I could think of to get the full range of the pot using the travel limited by the accelerator cable. When the micro switch turns on it reads 50 ohms. I've included a pic of it for you to see too. There will of course be a cover over the whole contraption to eliminate dust etc.
I would like to know what is the best way to connect the pot and microswitch according to you. You've seen how I connected mine up and perhaps I should not be connecting it up this way.