I’ve designed a handy encoder adapter board which works great with ABZ encoders and hall sensors. I’ve tested it and its working well. Includes filter caps and test points. It’s licensed CC0 and designed in Kicad. The PCB can even be ordered directly from OSHPark: https://oshpark.com/shared_projects/uQ8zueoF
Take a look!
Big thanks to my employer Twisted Fields run by Daniel Theobald for funding the work and letting me open source it.