I started by using a lot of inspiration from the electric brewery. He has some really easy to follow documentation that I used to modify the system to meet my needs. I have two PIDs on the box. One controls the element, the other is just for temperature monitoring out of the mash tun. I'm hoping this will let me maintain a nice mash temp throughout and easily go up to a boil.
The next true test will be doing a brew day. I have one (or two!) slotted up so I'll have beer in kegs before the new year's eve. Life is good! Happy brewing