Karl wrote:

This is so well done, bravo. Did you consider using Auber PIDs? Just wondering how you decided which ones you wanted. Also just wondering if there is anything you would have done differently now that it’s done?

I’ve got these PIDs because of the price. It took 3 month to get them from China, but I ordered when I started the project. They work as expected and I cannot complain.
I would not change anything in the design. It works great for me as it is. But that’s a choice of personal preference. You can do it much cheaper, without an alarm, without mash PID, without AMP/Volt meter…