I have tremendous respect for your efforts and goals. I should have reiterated that in my original comment. If you need to price these boards at $350 as a measu

I have tremendous respect for your efforts and goals. I should have reiterated that in my original comment. If you need to price these boards at $350 as a measure to ensure the success of your project, and you have people willing to participate at this stage of development at that price, more power to you. But your git repo looks like you need people to help and contribute, so I might suggest that it’s a little early to be amortizing your R&D costs onto the prototype hardware pricing. The projects I’ve seen successfully transit his stage usually arrange group buys and the like to get it into the hands of potential contributors as quickly and affordably as possible. This is also unlikely to be the last revision you want to make to the hardware.