About 5 years old. Haven’t really used it since I got my new Longarm with the M bobbin (Nov 2019) except to wind a few bobbins for my domestic machine. I tested it out, runs very well. You will see a huge difference in consistency between this unit and your Singer sidewinder. Had a friend a few years ago who got rid of hers, and tried to use an aftermarket winder on her APQS Longarm, and she asked for my help with tension issues, I had to run home and get mine to prove to her it wasn’t the LA, but the winder she was using. She went out and ordered a replacement from APQS. Expensive lesson learned.