I think the best source of data for this engine is the Continental M-0 "Standard Practice Maintenance Manual'. This covers nearly everything on every Continental engine, including the procedures and settings for the IO-240 engine. The latest revision was in February this year.
I should try a lower idle RPM too, mine is around 850.
I confirm my full throttle static RPM metered fuel pressure at every condition inspection (it's displayed on the G3X engine screen) and have not needed to adjust anything in the last couple years.
To adjust the fuel system you need to hook up an accurate and calibrated pressure gauge that reads to a 1/10 PSI.