Will the attachments for a Singer 328K fit a Singer 99K and Singer 15-91? I have a 99K and a 15-91 and they are compatible (the feet that is). I have looked up pictures of a 329K and it looks very similar (at least around the foot). My cousin has the 328K attachments but no machine and she is willing to give the attachments to me but I want to make sure they fix before I pick them up. Thanks for any help you can give me.