It was not hard to do - not the weaving, nor the cord-twisting, nor the ring-making, though all parts had a little tendency to be fiddly. The wool was slightly sticky (which was remedied with the application of some size), twisting the cords took a bit of time until my fingers got back into the smooth action, and wrapping the end rings with fibre did turn out to be the fiddliest thing of all of the process.
I will definitely look into improving my method for the many, many ring ends on the skirt! At least after some more tries now I know that the fibre has an immense influence on how the wraps look, and how easy they are to make. Which means that I might end up using a different wool fibre than the one I had planned to use, as the results are just so, so much better.
It's amazing how sometimes small differences between materials can have a really, really huge impact. Have you had a similar experience with two kinds of wool that appeared not so very dissimilar at first glance showing very different behaviour, or very different outcomes?