Suggested cool down temps between tanks? I saw mention of "a certain temperature range" and was wondering what that is, in general.

The reason I ask is because it's easy to leave the heater on and just unplug it....especially when some are idling on the box through the first few tanks. Normally (not using a heater) I just wait at least 5/10 minutes with piston at BDC. Then reheat to over 200 with a heat gun before restarting. I don't track cool down temp...if I can hold the head it's cool enough for me.