I created this attachment for the Monoprice MP Select 40mm Fan Duct Shroud V2 https://www.thingiverse.com/thing:2166473.
This attachment sits about 1mm off the bed. It blows wide in both the X and Y directions. The idea is the material stays in front of the fan longer after it is laid down so it will cool more.
I tested this with the Cooling fan test torture test https://www.thingiverse.com/thing:3167063.
with the original attachment for A_Makers_Life's 40mm Fan Duct Shroud V2 and could not even complete the test torture test. With this attachment I got 10 deg more for cleaner overhang. It starts to show drooping at 60 deg .
A_Makers_Life's 40mm Fan Duct Shroud does not sit right on the part that holds the hotend. The bottom part that angles forward it too high and the whole thing rest crooked with the back pointing alittle more up. I fix this by heating it up to get it soft and pushed it in.