Congrats on a great machine... I've had this one for years and have loved it... I recently upgraded to the NQ3500D and will soon sell my beloved PC 420 (space issues), but I did make a video to help other people who struggle with the default needle left issue... I was breaking too many needles on the machine with the quarter inch foot on and wanted the machine to start always in the middle needle position... I hope this helps!
https://www.youtube.com/watch?v=Xfq-GW88DsA