Yes, heaters, hand raised
4 heaters, two temp probes, one apex.
Thought on two probes:
1) I had a spare port for another
2) If one probe is somehow accidentally high and dry (reading 72), the other is there for a sanity check.
Both heaters are on one apex outlet, so that is not good if that relay fails on. I really need to split them apart. Maybe a good project this afternoon...