Did ya ever get it setup on your v400? im working on it now myself.

lets see your End gcode too! You'd want want a 6 pulse move command, but then I think in direct drive, you'd have to send a retract code as well. usually bill responds fast. im surprised he hasn't chimed in yet.

End Gcode would be where you'd want it. You'd need an "unload filament" code for your machine to unload it from the hotend, then you'd need a "move" command to send your hotend and trigger the switch for x-amount of time, and then the chameleon would unload the rest of the way. which machine are you using and which mode is the chameleon in?

Thank you bill.