Offset 40mm fan to 80 mm fan

This is an adaptor I made for the Tevo Black widow cooling fan vent. I was unable to source a 24VDC Fan locally, but I did get an 80mm fan. Their was another adaptor available on thingiverse, but it was concentric, Meaning it would have impacted on the heat bed. I haven't put in screw holes on the 40mm side, as I have simply super glued this to the vent. Also, I ran out of design time, as I have a 2 year old, a 3 week old, and a wife. Will post pictures of it mounted when I have the chance. Also