I have the BL Jazz and I am fmq with it. When you change the tension you need to have the presser foot bar up. I have watched videos using it for fmq, I put the feed dogs down, BUT you don't change anything else. You don't have to put the stitch length down to 0, I leave it on 2 or 3. The problem I had was shredding thread and breaking, so I went on line to try to get more info and found I should use a size 90/14 needle. So, I changed my needle and haven't had a problem again. I don't have but 2 needles of that size so I just ordered some online. Other than these problems I have had no other problems and I love this machine. I would have loved the Up/Down, bur I have found all I have to do is tap the foot 1 time when I stop and it goes down, sometimes I don't even have to do this. I hope this helps you, good luck