There was nothing really wrong with my old serger until I killed it. It made a perfectly lovely stitch on most fabrics, with some adjustments needed on thicker or stretchier fabrics. Nothing that an hour or two of dinkin' around couldn't fix.
The Babylock Eclipse sx.
So when I brought it in for repairs I was unconvinced that I really needed a new serger, if they could fix my old one. But I was WRONG. What if serging any fabric perfectly was simpler? What if threading a serger was EASY? Wouldn't I want to upgrade? uh, Yeah! I think now that I have come over to the 21st century I will more likely sew clothes and decor items without a hitch.
You will note in this photo that there are no extra guides to thread through, just a blank wall where those guides once were. And the threading has FINALLY gotten smart. The thread goes in TUBES, with the aid of a tool that is a springy wire which is first fed into the tube, and then the thread gets pulled through that tube by pulling the other end of the wire. The wire has a loop at one end, like a needle threader. It threads in one pass, just like that> SNAP! There is even a place to store the threading tool so it never gets lost. Yay!