I too am intimidated by FM quilting on my domestic machine. My machine of course has stitch length control. However, when I drop the feed dogs, now the stitch length is totally under my control. This is where I come to my problem my rhythm...movement whatever you want to call it...one stitch may be 2...then my movement makes it 4 then 3 and so on.... Terrible not consistency in my movement to make even stitches, I guess?
I visited the Houston Quilt Festival and they were demonstrating a machine at that time that had stitch control while you were doing FM quilting....ahh that would be heaven for me!
I have a Husqvarna Viking 1+, which I'm devoted to.