Single tail hooks dressed with feathers/bucktail cast and sway better if you use a split ring. You will need to twist the tail loop 90 degrees to do this right.
I think what NS is trying to imply..The tail Loop should be horzontal.So when u add the splitring the hook lies straight..Looks like the top one is that way already..So u won't have to turn it.
FORE!
It's usually darkest just before it turns Black..