About this 3D model

After printing the excellent 30mm to 40mm fan adapter for the Prusa i3 MK2 found here : https://www.myminifactory.com/object/original-prusa-i3-mk2-40x40x10mm-fan-adapter-25828 I found that the fan produced a noticable draught onto the heatbed occasionally causing issues.To combat this I created this duct to help reduce the effect.I imagine it could be used in a similar fashion for any 40x40mm fan. I mounted it using the 18mm M3 screws originally used to mount the 30mm fan.