Very interested to see how this turns out!
Curious why you decided to go for such a dry mead, with ~1.2lbs/gal? I assume you're really trying to highlight the yeast and bacteria as opposed to any residual sweetness. I don't have any experience with cotton honey, does it have any stronger flavors than say a clover? If it does I'm curious if it will be highlighted at all.
Any plans to carbonate this like a lambic/mead type drink?
I think I may have to make one of these now that you have the rusty wheels in my head turning