This is the salient point for any discussion about the merits of GFCI in the home brewing context. It doesn't matter how many years you've been a professional electrician or if you never changed a light bulb. What matters is you build your system with proper gauge wire, good connections, good...
When I used to mash in a 10 gallon igloo beverage cooler I would put a put a piece of foil on the top of the mash, it helped hold mash temp a lot better than you'd think. Also definitely preheat, and skip the 5gallon cooler you'll eventually upgrade anyway.
The important thing is that you will soon have the joy of electric brewing.
I'll never go back to gas (except for another Katrina or zombie apocalypse of course)
What are you using to make connections? Make sure your using the smallest size connector that's rated for the wire gauge you're using. It will help with tying multiple wires on one post.
I hated cutting those square holes, slow and steady is my best advice.
I'm into simplicity. What are the two switches under the PIDs? If they are for alarms you could just wire one switch for the alarm. Also pick either the white or yellow indicators, I like knowing which line is actually...
Buy a 2 gal corny keg and ferment in that. All you have to do is remove the gas post and put in a blow off tube or attach a gas disconnect with a tube.
Not cheap, but much easier.
That will work, but I'd suggest using a little more grain and skipping the sparge. A little bit more grain will save you a mess and some effort.
Look into a bag, wisler for instance. Will make separating grain and wort a lot easier.