I have a cheap White serger that I bought several years ago at Hancock Fabrics, and had a h--- of a time learning to thread it. It came with a cd and I would look and look at that until I finally got it. I do like to use to for finishing seams on certain articles. I've never oiled it or changed the cutter. Don't even know how to oil it. Guess I need to look in the manual re: that. Anyone know about oiling it?