So here are some pics of my new scalder. Today was the first day I fired it up. I've decided to ground it the dolly it's mounted to, but I haven't actually screwed it on.
I wrapped it in the duct insulation, like yours. Instead of just one layer, I decided to wrap it in about four layers, to make it as thick as a hwh, and also because I really don't need extra duct insulation lying around here.
I wanted to seal the top to keep stinky chicken water from running down between the layers, so I used a ton of duct tape, which didn't really stick very well.
I probably didn't need to, but I sealed everything with silicone: screws and the hole for the element.
The etc is a really slick piece of instrumentation. I'm very happy with that.
The barrel I bought had been used as a rain catcher for someone's gutter, so it was already fitted with a side spigot. It's not central like yours, but it seems to work ok.
The first element I bought fried up in a second because I turned it on with no water in the barrel. For anyone thinking of making this, Please do not do this. It could have been a bigger disaster than just a $10 element.
It took about five hours to get it to 155. I think, when I'm ready to use it, I'll turn it on the night before I'm processing chickens. I'll post the pics in a second.