I've read over and over on this forum and in others that you can't FMQ on a 401, 403, 500, or 503 because of the horizontal bobbin. Luckily, I tried it before reading that you can't. I guess it's a case of being too dumb to know better, cause I seem to be doing okay. I'm not great, but okay. I'm planning to follow Leah Day's blog on practicing FMQ to get better. I'm not saying it's the greatest machine to FMQ on, because I don't have another machine to try. I suspect that someone wrote this once and people just repeat it without trying it themselves.
Does anyone else use a 401, 403, 500, or 503 to FMQ? Please post if you do, I'd like to know.
Here's Leah Day's blog, if you're interested - http://freemotionquilting.blogspot.com
Oh, here's a photo of a practice sample of FMQ on my Rocketeer.