I haven't used it yet, but it does test leak free overnight. I went ahead and built out the heated grant. Here it is ready to collect wort from the MLT.
Here are the guts, a couple of float switches, temp probe and 5500W 240V spa heater.
In the back, it's a 240V in with RCA cables for float switches and a networking cable connector for the thermometer. I'm trying to avoid long dangling cables hanging off of my components. The extra cords make it harder to move things around and clean.
I silver soldered welding spuds onto a stainless steel restaurant pan for the outlet. I used the same technique on the temp probe because I had the parts to make it happen.
I placed the entire setup in a cedar box, mainly because I'm trying to stick with stainless and cedar for the esthetics.
I also silver soldered a copper lug to the pan for a ground. I used copper lugs to mount to the spa element and then coated them in Plasti-Dip.