I found this video by Dr. Bob of Superior Thread quite informative where he talks about the "Magic Needle." In it he also says the metallic needle and the topstitch needle are the same needle. The video is not very long and I'd be interested to hear your comments.
http://www.superiorthreads.com/video...titch-needles/
Also, have any of you used Superior Threads? I cannot find any locally.
GrandPa