GSS: I suppose I missed a few things scanning through the above, especially some of the longer lists of tunings.

One aspect of my post of yesterday to this duscussion that I perhaps didn't emphasize was that both Vastapol and Spanish come in two "versions": open-D and open-E "Vastapol" are essentially identical in terms of playing (fingering, chord shapes, etc.) while differing in pitch. And of course, same for open-A and open-G "Spanish."