Oh my goodness....Anna quilts....I have just raised the feed dogs and guess what perfect stitches again and again.....I don't understand why it makes such a difference but I think you might have just saved my sanity.
It is 11.30pm here in the UK and I haven't managed to get it sew properly since 7pm....had tried everything, cleaning...new needle...new bobbin...different threads but never thought to raise the feed....as I said have just tried it and like magic... perfect tension......thank you, thank you, thank you.