Do you match the thread weight in the bobbin to your upper thread? Also what kind of thread would you use to fmq flannel quilts? I just finished two flannel tops...never again!!! The lint has kept me sneezing and my nose running! I'll be glad to have them finished and sent to my ggs's. :( I wanted to use up the flannel I had collected...I still have a few pieces for baby quilt backs but no more flannel quilts for me!! cough cough, sneeze sneeze!!