To continue the theme, I agree with Paul
However in its natural form, my bogey fly is the PTN.
I know how, when, where and why to use it, but unless it has hares ear or pearl in it, then i don't catch with it.
However i have a fancy that
if when i ever get to fish a chalkstream, it might just work for me
With H.E. it catches loads
most likely down to usage
Sandy