If you've done fmq before I'm sure you won't ruin them! Just be sure you have the room to move the quilt around, some machines more space than others. My older Pfaff 1209 has 8" but my newer 2034 only has 6.5", what a difference although it doesn't look like much. I just returned from a quilt retreat and tried doing fmq on my 2034 and had a terrible time but was much better with my 1209, so even though there was only a 1.5" difference it was much easier. I was a little envious of the others who had machines with 10" space, but I don't think that is common. Good luck, you'll do fine!