Sorry you are so frustrated. What kind of thread are you using? I have the queen quilter which is the tin lizzie before they had the lizzie stitch. I have never had any problems with my machine. I have had it for 3 years and it has always
worked great. I think more people have had problems with the machines with the lizzie stitch. I use metro embroderiy
thread and never have to adjust tension. It is also reasonably priced. Hope you can fix your problem soon.