The remix is for controlling air flow to the nozzle while printing ABS.
There are 3 pieces in the designee the vent that i didn't change and 2 "door" vents one to close the air flow to the nozzle and a second to close the hole and redirect the air flow to the nozzle regularly.
worked really well for me will printing with ABS.
Ender_3_Vent_Mechanical_Cantrol3.stl | 1.1MB |