Duet 2 Maestro Enclosure (Extra Vents)

I have modified ktapper's Duet 2 Maestro Enclosure that was very well made, BTW, to add many extra vents. I crudely added the vents, but, they were very much needed. I had trouble with both Fusion 360 and DesignSpark Mechanical in adding holes to this .stl file, so, I had to go with the convoluted Tinkercad. Therefore, to simplify things the vents are rectangular prism holes, because in short, Tinkercad sucks. These Duet Wifi/Duet Maestro/Duet Ethernet boards build a lot of heat on the bottom, w