Thanks for the response! If true, this would make the experience more like a Metcal then. Very good iron. You must have your thermistor/thermocouple very close / inside the tip itself then, no?
No doubts then on the tip quality - I've seen the rest of your stuff (good).
Yes, the thermistor is inside the tip. That's essential to getting good performance out of the algorithm.
The instant that the iron detects that it's under load, it pours power into the heating element. That makes it feel and perform like a much more powerful iron. We're dynamically responding to the power load and flowing heat into the material.
No doubts then on the tip quality - I've seen the rest of your stuff (good).