Except for the "modules" (we're going to call them mini-boards now to avoid confusion) there is nothing proprietary in the Baby Jet and Sierra.
HashFast is dedicated to open source and community empowerment, in both hardware and software.
To make an empty Baby Jet or Sierra, all you need is fairly standard stuff from Newegg/Amazon/Craigslist.
- an ATX tower with plenty of ventilation and places to mount the liquid cooling system radiators
- an ATX PSU with plenty of wattage (get twice what you need to ensure cool, efficient, reliable service)
- a controller with enough RAM/CPU for your needs (Raspberry Pi/tablet/smartphone for BJ, basic 1U Debian server or old laptop for Sierra)
Of course we are thrilled to have The WASP and other DIY projects contribute their own ingenious chassis/cooling solutions, but until then off the shelf parts are fine.