You guys honor me. Thanks..!
The controller you need to make is pictured in the following diagram. It uses a single Auber Instrument PID SYL-2352. This PID has a normal mode for temperature control. It also has a manual mode that allows you to set it to a percent of power so that you can easily control the boil rate in your kettle. The same setup can be modified later on so that you can control 2 kettles with the one PID. You would simply add a second contactor and element setup. You would then just need to change out switch #1 to a 3-Position Selector Switch
<Click it). Most all of the controller components can be secured from Auber Instruments, including the project box to house it.
Ok - now on to the usual: Click on the image to see a full scale diagram that is printable on Tabloid paper (11" x 17").
I hope this helps you in your adventure.
Note: I forgot to mention that I think it is critical for you to set up your brewery power using GFCI circuit protection. You can get a very good GE Spa Panel from HomeDepot.