I have an Innovate LC-1 WB and don't like simulated, just makes tuning weird, easier to tune with WB Open Loop to get good fuel VE tables. Dial them in to 13/14 to 1 and leave the boat OL.

I'd like to see how you machined that intake for O2? You seem to be having issues, wonder if it is just cooling off the O2 sensor because of the water cooled exhaust? Or a heated O2 would help? I've always done boats OL.