I just got a used Bernina 180E sewing machine and did some FMQ with regular Gutterman thread and it did fine. On the same project, I used some pink embroidery thread and could see all the bobbin stitches on the top. I just took them out last night and haven't redone the stippling with Gutterman yet. I am just as interested in hearing people's opinions on what kinds of threads to use for FMQ.