Good news & bad news. Cannot find the angled screwdriver that my dh insists I borrowed before. Have torn through my sewing area looking for it. Every little screwdriver I find is still to long handled to fit properly and I don't have a ratchet one (yet!). In looking under the machine, removing the bottom tray, and inspecting to see if I could access the area from below (I couldn't) and turning the machine upright, fiddling with lowering & raising the feed dogs, I finally loosened the caught thread and was able to pull it out. Rethreaded and inserted new bobbin and it's working like a charm!!! I know I must still keep lubricating and get a proper tool to get that face plate off some day and give that area a good cleaning. Thank you all for your good suggestions!