Sweetspot this morning. Little ring, erg mode. Second picture is zoomed in on the second interval. Storck = Shimano R9200P. Again, the Shimano and Wahoo line up really nicely while the Rally is unacceptably off. I did the reset all angles yesterday hoping it would help. It…didn’t.
I read about this before you posted and I was troubleshooting. Seems like a true pain? Have you done it? I’m not sure if I’d be able to get the bike perfectly horizontal and raised. Maybe using a workstand I could get close.