Nancy, yes. My machines with horizontal bobbins can do a good job of FM, but the vertical bobbin machines perform FMQ a touch better. There are less tension issues. 15's will do a great job because of the vertical hook. If you've read my past postings about the 319, the issue is the design of the needle clamp or needle holder. It interferes with any FMQ foot/darning foot I've tried.
I was hopeful that the new spring I got from Cathy would work, but it doesn't. It again hits in a spot that makes FMQ impossible. I'm going to try the spring on my Rotary 77 to see if that will work. I think the 319 could be a decent FMQ machine, it's finding a foot that works that's the big problem with this machine!