I'm sure there is something I am missing here but,
Still have BIG thermal inertia of iron soldering (about 7-8 degree)...
Do you think you can do better then this? Or need to? Now if its an excersize in learning and just the fun of doing it, well thats a great reason. But I would think the tip temp will cool that much if you just blow on the tip. but to raise it will take full power for a few seconds to get it back, then it will overshoot. Just my HO.