The "40" fanduct is a prototype for dual 40mm fans (for Noctua's afficinados ^^).
3 existing versions : no sensor, stock sensor (SN04-N) and BLTouch sensor. The design contains two objects : the faduct itself and a specific support to adjust the fanduct to the 30mm heatsink.
2016-09-04 : Added cut support for models with sensors.
2016-07-20 : Added 8mm sensor (18mm diameter) version