I have inherited several sewing baskets from friends(great auntie's and cousin's left over sewing stuff no one wanted after homes were cleaned out. "she sews give to her") and all of them have feet from unknown sewmachines. NICE feet, hemmers, 1/4" feet, cording feet... They have the same bar accross the foot that looks like my Kenmore would accept. I know one was from a Viking I found bobbins in the same box. I am just too chicken to try and destroy my machine. I have never used another machines parts on my machine. Am I safe to try them?