Are you using the "R" foot or a spring type darning foot?
I have a Sapphire 875 and find that the spring darning foot works so much better for me. The Machinger quilters gloves are a huge help too. I take the sm/med. size.
http://www.softexpressions.com/softw...Gloves.php#mac
I set the tension lower too and it seems to help. Slow down and remember to breathe and relax. This is supposed to be fun.
Sharon W.