I'm not looking for support, but thanks anyway.
I would have done this on my own anyway. I'm happy to do it in a group instead of by myself.
Just to be clear, I am wanting to build a brewstand controller, not a fermentation chamber controller. I'm not against fermentation controllers, I'm just focused on controlling the mash and boil(s) right now.
BTW, I am hoping that this doesn't require a PCB, other than a simple RPI breakout board from the connector to some terminal screws, which is easily made or bought. To me, that is the beauty of using the one wire temp sensors and a simple relay board.
As soon as you need PCBs, it makes things a lot more difficult for the DIYer, at least for me, anyway.
Here is the relay board I bought.
It will control my burners and pumps.