401's would be last on my list for FMQing. LOL. I have probably 17 vintage machines and it's a wonderful machine, but not for FMQing! The raised plate and horizontal bobbin are not the best. The best vintage machine that I own for FMQing is the 301, hands down. In fact, I own 5 of them because they are so great. Larger throat space and a vertical bobbin make it a wonderful machine.