Well I thought that I had watched a youtube video on the both of them and thought they would interchange..I will have to watch it again. I can get a 1756 but it has nothing with it at all.I can also get a 17741 that has everything with it. It sure would save me a lot of money if even just the cams would swap out. I have been looking for so long to find something that all my info is running together. I have to get something soon as I don't have a decent machine to sew on, well not one that will sew through the seam on jeans. Thank you so very much for answering. It is so hard to find info. I tried going to sears site but I couldn't manage to read it right for some reason. Thanks so very very much. Back to the drawing board.