I ended up having to put little marks on a few keys to use a reference points (much like the dots on a guitar fretboard). This helped tremendously but I hate that I had to "deface" the keys. (Hopefully, the whiteboard marker that I used can be erased).
I'm wondering if there might be a way to arrange for certain LEDs to be used as markers instead. I.e, be able to have defined LEDs stay lit all the time (and also be able to turn OFF the leds at the bottom that are used to control the eigenharp itself)