[Al Skierkiewicz]

You might try gearing the pot to the device you are trying to measure. That makes the pot an off the shelf item. The shaft of most pots are 1/4" so finding gears that mate with that shaft is pretty easy. Plastic or nylon gears are available from our list of suppliers cheap and they work well. You get to use maximum resolution from the pot without sacrifice. Just be sure to give yourself a little leeway. Pots are about 270 degrees but that is not guaranteed. Plan for no more than 250 and you should be fine.