Hans,
I suspect that one of the most common mayfly hatches we fish each year is the PMD hatch. Any chance you might provide a video of your favorite PMD pattern tied in a common fishing size - say a #18?
I would really enjoy seeing that.
Thanks,
Byron
PS When you wrap hackle from the eye back to the beginning of the thorax, do you reverse the hackle? Do you have the shiny side facing the front?