Update:
I was able to get some encoders that fit the PCB with a bit of massaging. All of the encoders now work perfectly — but only in one direction. If I turn the encoders counter-clockwise, the parameter value decreases smoothly, but if I turn the encoders clockwise, the parameter value does not increase. When turning the encoders clockwise, I can briefly see the parameter value blink (or sometimes go to the next higher value for a moment) — but the parameter won't change. Any suggestions would be appreciated.
thank you