Got the new cassette on last night and bike works properly again :-)
What a gong show this morning. They are expanding the highway I ride along and right now it is down to a single little makeshift lane that is too narrow for a motorist to pass a cyclist. While a train was taking its sweet time (15 minutes) at a crossing, there were 3 of us cyclists who filtered up to the head of the line, and all the fuming drivers were forced to then follow us at 25 km/h through the construction zone. It was glorious. I'm starting to get a bit paranoid about having objects hurled at me

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