Tks, everyone. I'm using the 1/4" foot. Should the dual-feed be engaged, if so, it's not stayed engaged. I'm using Aurifil 50wt 2 ply and the tension is on 4.
Snip, that's hilarious and all this time I've been blaming myself for moving it, nice to know it's the machine's fault, lol.
I just re-threaded both top and bottom, inserted bobbin and off we gooooo! Beautiful interlocked stitch. I swear this thing has a mind of it's own. Good thing, tho, because I lost mine a long time ago.