Weezy rider, I read the article and I feel reassured that the needle and thread size match. However, I'm not using and embroidery machine. Today, I put 40wt in the bobbin and that worked better and set the tension on 2 and that seems to give me the best stitch so far. The machine sounds smoother now. I'm not finished with experimenting yet, but I do feel more hopeful. Carol Ann Waugh who teaches Stupendous Stitching on Craftsy says she even puts 60 and 50 weight in her bobbin when she using heavier thread on top. So I'll try that out tomorrow.
Thanks to all of you who have taken the time to help me.