I just bought a second one and the button hole dial won't reverse the stitches when it gets to the setting where it should go back to the beginning. I am oiling and trying to move it and if I needed to use it I could just move the knob up to the reverse position but would like to know how to get to go automatically. I love this machine and would sure like to have a service manual for it. I have 2 adult children who want one each.