My 401 (slant machine) doesn't play well with FMQ. It always breaks the thread when I try to move to the left. However, it does a fine job straight quilting with the walking foot. As I don't own a 301, I can't give advice on it.
After doing much research, and asking advice of other quilters, I purchased a vintage Bernina 830 Record that I reserve solely for FMQ...it is a jewel!