I spent too much money on this particular Singer 66 and it is in sorry shape. I am willing to spend a buck on a check spring for it, but I am not willing to buy it a new motor. So, what the heck, I took the plunge and opened up the motor.
Can you imagine what this must have smelled like when it melted? This motor is trash. But I haven't thrown it away yet. I am studying it. (Gee whiz, I must get a little tripod, or new glasses)