I first heard a version of Vestapol from an American guitar player on the radio about 40 years ago - no idea who he was. A friend of mine taped it on a cheap little reel-to-reel machine with a mic held next to the radio speaker.

I've played it ever since then but had no idea, for many years, that it was in an open tuning, and was trying - without realising it - to imitate the open tuning sound!

I still play it that way, and it was one of the very first videos I ever posted on YouTube. You can see it, if you're interested (and the video quality is pretty crappy) at: Vestapol.

I really can't be bothered to learn it in any other tuning after all these years...