I agree with you Valery. I think it's interesting from a historical point of view as the vihuelaists mention it as the technique for doing redobles. As a practical technique I'm not sure it's worth spending a few years learning to do well as Ralph did. But he's an academic at heart and academics love those kinds of esoteric things. I applaud him for his effort.
To me, if technique gets in the way of the music it's no good. So I tried it and couldn't make it work so went back to my normal techniques of pi and/or mi. We won't know what Milan or any of the other vihuelaists actually did until someone discovers a video or DVD of them playing (Somehow, I don't really think one will be discovered but you never know...ancient aliens may have recorded their concerts
). So anything we do to copy the style and technique for early instruments is an educated guess at best.
Anyways, I enjoyed your Milan. I look forward to more.