I also have a Tin Lizzie and no end to a couple of issues, until recently. They do have videos up now to address some of these, and I got no joy from the dealer. However, since he sold out and I was able to speak to the tech, and have mostly solved the problems. There are no manuals except to set up the machine, but once I was able to deal with those issues all is fine.
My problem with tin Lizzy is tension. I took it in for service and the sample they sent back was great. So I loaded my quilt and off I go but when I get back to the other side of the quilt all the sudden I have eyelashes on the back of the quilt half way through the row. Have you come across that?