I just purchased a Viking Mega Quilter and I removed the bobbin casing to put in a bobbin and tried to sew and it didnt sew. So I took out the bobbin and saw a little metal type of clip halfway there under the bobbin after I removed the bobbin. I pushed the clip thing to the bottom of the bobbin holder and slid it all the way. I put in the bobbin and it was now sort of springy not laying all the way in. I tried sewing and it is sewing ok. Does anyone know if theirs has this clip thing and if their bobbins lay flat in the bobbin case?