It's been a pleasure reading this thread and about your path.
Thanks for directing me here after some discussion in the Splinter thread.
I have been asked to clarify that I am not offering any of these devices for sale on this platform. I do not have a commercial account here and am not interested in converting to a commercial account. This post serves as a build diary
One initial comment about your statement here; It's fine that you do not want to be "commercial" here on FC, but I would have appreciated some head's up in your visible credential that you are a maker or some such thing (there is a degree of 'promotion' inherent in this thread, though I do understand you to be righteous, honest and quite focused on your mission, and promotion is not your intent). I don't know all the 'possible' descriptors for use here, but some indication to the forum would be appropriate, imo. Not a particular big deal...
Bravo! I really, really do applaud your efforts! on several levels. I'm a retired woodworker, so there's that - I love seeing someone get into it, my relationship with wood and trees runs very deep. I guess on this note I will add a word of caution about "exotics" - and some not-so-exotics. Some will release toxins (or allergens) under certain conditions, these range from shop safety (fine airborne particles) to product safety/liabilities and shit -- for which you may be later held responsible. Apologies for these negative thoughts, but I'm old, seen a lot of weird shit go down...
So, there is on one hand the imperative for clean airpath and vapor path, but you are indeed testing for the 'taste' of the wood in your trials...could these two things be at odds?
Over decades my attitude has formed into one that leans toward woods that come from nearer to my own geography, these speak to me in ways the exotics don't. Comfort, like mac n cheese rather than caviar?
I've not seen so much here about the side-by-side mount, which was my initial inquiry. Are you 3d printing or otherwise making those? Or, where are they from?
I know zero about entexchange, but may have to learn. What else is new?...sigh.