Drum heater automated mash tun

[crippled1]

I was playing around with an idea to reduce my level of monitoring my mash tun and it works really well.
Its a 700 watt drum heater, it has a thermostat but it has no fine control so I‘m using an Inkbird and it hits my target and maintains it quite well.
I was considering going to an Anvil foundry but don’t need to now.