Would it be possible with the introduction of the filament switch module and multiple AMS going to either Intlet A or B for the user to input the distance from switch to the 4 to 1 PTFE adapter. If the software has this information then when retraction gets past the 4-1 the other AMS could start feeding. At the moment if we are switching filaments from AMS 2 to AMS 3 both on Inlet B we have to wait for the full retraction on AMS 2 before AMS 3 starts feeding. Prior to the switch it would be to hard because of different lengths feeding into the machine but with the switch it would just take the negative distance from the switch which would be a constant after the initial set up. Just a thought.