I dig it immensely! I am purist in the sense of "design dictates style". Obviously shows the level of workmanship and thought you put into the bike. Some great techniques employed to provide solid structure with minimal metal. Really respect that in people's work.
Would love to see more pics, especially those from along the way...
If I could be so bold... Did you consider making your steering bars? You could turn a larger diameter tube down at the top clamp end to fit the tree, but use oversized tubing at the control ends to allow use of more modern controls, levers and switches. If that is your direction ultimately, it would have been a very clever modification.
Love the raw, utilitarian vibe!