To all the new I-485 filers- try to do an early FP. I know some locations don't allow, but try your best. People who live in bigger metropolitan areas, with more than one USCIS office, if your location don't allow an early walk in, try another one nearby. The other location may or may not allow, but don't hesitate to try your luck. if an adjudicating officer picks up your file and all required documentation is complete, visa may be requested immediately. The chances are less, but do whatever is possible to speed up the process. Good luck to everyone.