I guess I've never had much trouble threading my serger. It's a White and has little hooks instead of holes for the thread to go through. It also has a color coded threading diagram on the hatch to guide me. Although most of the time I do tie the new color onto the old one to thread it. Once it is threaded, I readjust the tensions, hold on to the ends of the threads & give a gentle tug on each thread above the tensions to "set" the thread in the tensions properly & give it a test sew to make sure everything is working right before starting on my project.