J, just be careful not to "over-steer" when making vent adjustments with clay or sand in the pan. Much like a boat's momentum, which a rudder only has so much control over, once any mass in the pan reaches a certain temp it'll take a bit for it to cool back down... just how the mass makes a cooker take a bit longer to come up to temp. That's why it's effective. It's a heat sink against smoke wood or charcoal lighting which cause temp spikes, or the cooling effect of winds or taking the lid off. Basically, what I'm saying is to be sure to catch temps as they come up OR fall, by making small adjustments and being patient before making any other changes.
I understand what you are saying. I will need some practice I'm sure...maybe something cheap to try first.