This is so interesting! I have never used a double needle in over 50 years of sewing, but I have several -- being ever the optimist that "I might, you know". Something about it always made me feel like I doubted I'd like it and I didn't really understand the purpose of one.
Now that I know the mechanics as you dear ones have stated, I KNOW I won't like it! Into the garage sale they'll go!! Thanks y'all.
Jan in VA