Can't get it to run to max governed speed anymore, it will creep up to maybe 1900 max under no load. I suppose that suggests the meter valve is sticking or I'm having fuel delivery problems to the metering valve.
Re trying to force the metering valve to exercise, I've done this about 50 times now, really tough as the slightest sudden drop in throttle position kills it dead with really tough restart. If you creep the speed up and down you can freely go from idle to the 1900 or so. If you increase throttle suddenly the rpms overshoots badly too.