I was just looking at the new Na Piobairi Uilleann website trying to find the page with back copies of An Piobaire, videos and measurements to name a few things in the Source but all the information seems to have gone.
Ooops, yes its all there, must have had a bit of a moment, was trying to fix my old camera earlier - too long looking through the high power eye glasses for my old eyes perhaps ! The spruce reed making looks interesting..not seen that before