Success I think. Ran it for 40 mins in town this evening with durametric plugged in to monitor. No CEL or codes. Seems like the O2 sensors are doing their thing.
The car feels different somehow. The noticeable feeling of increased power at 3500 rpm onwards has smoothed out. So I think that means that I should have a bit more at the lower end? Anyways. Need to drive it a bit more to see what else is different. I think it's going to take a while to get the ECU to figure itself out as well, so more fun KMs ahead!
Here is a snapshot of the graph after the drive (warm engine) at idle.
