DH and I got this machine last week and cleaned it up today. It is a Montgomery Wards model 458519 found under the slide plate. This machie is a shuttle, but electric. What our problem is how to thread it. We have tried several different ways and nothing works. So if any one is familar with this machine would you help us? It is a 3/4 machine.Also it is crinkeled. Looked on line for a manual and no luck.