Thank you, Joe. The manual I downloaded does not tell me much about the cams. What are the top hat cams? And how are they different from what look like sets of black-colored cams I see advertised on eBay? Does the "built-in cam stack" have certain stitches already within the machine without having to put in a cam at the top of the machine? Any further explanation you folks on the Board can give me would sure be appreciated.