Well... long time no updates but I'm just gonna go for it.
I've got an extra USA GF connect controller and a hot rod heat stick (1650W, 14A) that I'm gonna use as a sparge water heater. Should be simple enough. Plug the heat stick into the connect heat element socket and put the heat stick into an old kettle. I guess I'll report back after my next brew. Perhaps a relay would be a good idea, but that's a little bit above my EE understanding.