Ken. Tempting, but... jnshr raised an important question: "durability"
I've been testing a small rotation of a pipes, that I've smoked both easy and hard. Hard meaning successive bowls and smoked until hot without allowing time to cool/dry. My concern is that the nodes are not of the same composition as with the side walls. They are softer/weaker and prone to burn through. The follow example is a bowl with nice cake forming, the second image is the plug removed to reveal the underside of the air chamber. You can see charring of the node wall, but intact.
Then next image is the result of the node when purposefully smoked hard and kept hot for one month, and it's cracked, and burning through:
I do not have long term experience with briar. I do know of and have seen example of cracked and burned bowls from misuse. I also read up on some folks whom take care of their pipes and admit that they can last decades.
The alternative? I have to reinforce the node wall. Maybe a use a disk of briar or oak, or even drop in a briar bowl? Thus the bamboo becomes a style thing. Instead of a root stem, it could be entirely primitive look, with briar benefits.
Otherwise, full disclosure is certain and buyers would have to be aware of this, that this is not a daily smoker, etc.
I don't remember many of my engineering jobs being this much fun.