Thank you everyone. I decided to quilt the project on my larger, heavier machine. If this had been a smallish quilt, I might have tried it on the 403. Nanoo... you can look for 401 and 501 (stitches built in plus additional cams) or 403 and 503 (all special stitches require cams)..there may be others in this series but those are the most common ones and thankfully, still not too hard to find! Good luck they are really great machines and such fun to use!