If you get a pot with a long enough neck you can put a plastic gear on it some ways under the knob probably beneath the control panel. If you attach another gear or 2 to that gear using the appropriate ratio which there are formulas for you can drive an indicator needle that will tell you exactly what your trim level is set to. Of course you could always have a second circuit that reads the resistant of the pot and relays it to a dial meter like an ohm meter or whatever. You would probably have to add a trim pot and set the right range so the needle will deflect correctly and you could center it. With the cheapo plastic ohmmeter you can take the clear plastic off the face and replace the measuring card behind the needle with one you make yourself that has a zero center and then degrees of deflection left and right draw or printed on it. That would actually be really cool so you kind of gave me a great idea. Only problem is I don't have multi-turn pots so I will probably just have a deflection range printed on the panel as the knobs I plan to use have a pointer needle on them already.
I'm getting the BU0836 I've decided. I look forward to working with it and might have to buy a second one of the step resolution is enough otherwise the next one I get will have to be the A or X variant.