Two things ............
One:
I just got my Sew-Classic order today. I put it in last Friday. Wow! I ordered some Class 66 metal bobbins. They are beautiful. They look to be one piece, not the 3 piece ones normally found. Very smooth plating.
I haven't used any yet, but if they work as good as they look I'm going to order some more.
Two:
Does your machine buzz, hum, groan and struggle to go?
Does it do all that then suddenly take off like a scared rabbit?
Do you have one of those universal black rubber band belts on it?
Then take it off and put a real sewing machine belt on.
I have had several machines do this to me. And each ran so much better with a proper belt on it I wondered if it was the same machine. The last was my silver SEWMOR 404. I didn't have the proper belt for it until my order got here today and when the new belt went on, oh what a difference.
Joe