Threading.......
I always have difficulty threading a serger and blame it on my poor old eyes.
However, I have found a perfect solution for myself.
I simply call my daughter-in-law who has young bright eyes and miracles of miracles, she shows up at my door and problem solved. (LOL, ROFL).
Guess you could say I have to do what I have to do.
Good luck threading, I keep trying before I make that phone call.
Sue