I have a Viking Designer 1 machine. I've tried the L-Shape prewound bobbin and it works just fine. I already use Aurifill thread to help with seam allowance, but notice that the prewound thread is finer that the Aurifill. Has anyone ever successfully used the prewound bobbin thread for both top and bottom - or is it just not something that is not recommended at all?
Thanks,
Rhonda