I was kinda bummed having a hard time sewing on my 66. I couldn't figure out what went wrong. The tension knob is in the same place as always, but the stitching looks awful. Unthreaded it, took the bobbin out, put it back in and rethreaded it...same thing.
Before I had a chance to post my issue, someone else posted to thread the needle from right to left, I know I went from left to right. When I get home from work, I'll rethread it and thread the needle from the right and see if it's fixed.
I haven't mentioned it lately, but not only is this board and it's members awesome, but I love this shop too!