Ok I'm sure this has probably been asked a few times in this thread but, I can't read 1,000 + posts ...... believe me though I did try. My question is this on page one I fully understand the wiring diagram as I do have a rudimentary education in electrical wiring. I also do notice in that first diagram a few things missing such as switches ( optional ) and indicator lights. I'm pretty sure I understand how to wire in the inicators etc..... My real question is in a lot and I mean a lot of other RIMS posts online not necessarily on HBT I see people putting in extention bars for more terminals as well as dramatically different wiring and control selections. I understand there are many ways to skin a cat ( no offense to PETA ) but, is the OP's diagram only meant for a bare bones simple no frills RIMS or is there any other sources that fully show a schematic with those bells and whistles like indicator lights , manual overrides, safety fuses etc..... ? I want to use the OP's schematic as a jump off point but incorporate fuse protection for the element as well as including indicator light and isolation switches so I can run the pump alone to recirculate and "vorlauf" and then turn on the element and control to step and maintain the mash temps. THanks for any input.