I just bought a 401A thats missing it power cord and foot pedal does any one know where I could get one. I use my cord and pedal from another machine I have and it sews a nice straight stitch but the zig zag pulls on the top. Is this the top tension or the bobbin tension. I think I heard if its on top its the bobbin and if it one the bottom its the top tension. Any help would be appreciated.