The 630 will chain stitch too. Not too long after I got my 630(sans Any fiddly bits) I bought a big box of Singer cr, er, stuff on Ebay. The pics weren't too clear so I wasn't really sure what I was getting but for $25 I figured I could sell anything I didn't want. It turned out to have more slant stuff than anything else including a couple of full sets of fiddly bits, around 40 cams(lots of doubles), and all 3 parts of the chain stitch for my 630. I think I still to this day have some of that stuff. Best box I ever bought.
Cari