This looks/sounds neat, I'll be happy to keep an ear out on how you're doing.
The thing keeping me from anything more yet though: What's the ductless option like?
I don't have any ducts, just hydronic+baseboard heating currently (and a dual-hose portable AC unit for cooling). I'm looking at a mini-split setup, but that's a fairly daunting prospect for the issues you note with the existing market.
When this gets to reasonable stability, this may be enough to get me to buy ReMarkable just for it. It might be worth seeing if they have any sort of referral program. "Buy ReMarkable through me & get X months syncing free!" type deal.
I don't have any ducts, just hydronic+baseboard heating currently (and a dual-hose portable AC unit for cooling). I'm looking at a mini-split setup, but that's a fairly daunting prospect for the issues you note with the existing market.