So when you send a T command to pickup a tool (e.g. T0) after the tool is locked and moved off the dock the downward fan goes on. It goes off after you send the T-1. Why turn on the downward fan? Also... When you manually select a hotend to change it's temp in the UI... The tool gets picked up and both fans are off until the hotend hits 70C or more, then both the hot end fan and the downward fan goes on. When I set the temp below 70C and the temp goes down the hotend fan turns off and the downward fan stays on... that is until I send the T-1. Then the downward fan turns off. Is this correct? Added... Now I see the downward fan actually turns on when the hotend reaches the temp Active setting. I do not see the value of turning the downward fan on for this at all. If anything it could effect the hotend temp by blowing air on to it. I'll probably change this in the config file.