Many, many thanks once again to Joe and Cathy for their help! I was actually able to pound the arm on my bobbin case back into position and she now WORKS very nicely! The tension issue is non-existent, and I think I have that washer in the correct position, too!
Here is my Beth, a 1946 Singer 15-91:
[ATTACH=CONFIG]313072[/ATTACH]
She joins Meg, a 2004 Janome, and Jo, a 1989 Huskylock. Hopefully, Amy, a new embroidery machine will be joining her sisters soon!
There are a few before and after shots here
http://s1023.photobucket.com/albums/af356/MiraxTHorn/ if anyone is interested. My favorite parts are the silver plates. They were sorely tarnished and coated in nicotine. Now they sparkle!
Thank you again for this wonderful resource for vintage newbies like me!
Best regards,
Carrie