I can happily report back that the Eagle NX cassette works great with the Kickr Core and my MTB AXS drivetrain. Chain wasn’t initially perfectly smooth so I made some micro adjustments on the controller/shifter and it’s all good. Rode it at 32x19. Not sure if I should go higher on the cassette .
Just finished my recovery ride Andrew’s using powermatch. Oddly enough it didn’t feel any different than my Kickr Snap. I likely need a workout with more power fluctuations to notice a difference I suspect.
I’m using powermatch so I don’t really care about the chainline as power is measured at the spider. I’m more concerned about how it relates to actual MTB power on the trails.