This is an awesome starting fan duct to help clean up your work. Especially if you are using the SN04 and are unable to relocate it from stock positioning.
The non-fan side screw hole can be a bit fragile. Use washers and be careful tightening the screws.
It's currently helping me to print it's replacement. I'll be sad to see it go. It really helped make beautiful prints.
Since there is no active cooling, be sure to print nice and slow. I ran it at about 50%.