The blades will likely be the only difficult component to print. With the exception of size, you can print the remaining files in any format you choose. However, because the build's measurements are fairly precise, you run the risk of it not working correctly if you try scaling them up or down.

Depending on the printer, the blades may need supports and some post-processing to ensure smooth motion. They print best with a brim of at least two lines, and I recommend using supports. You will require 12 blades in total. If the blades continue to bind after post-processing, use a lubricant like silicone WD-40 or another non-grease option.
The top ring requires glue to stay on the box; be careful not to get any on the moving parts; a few drops on the top ring should suffice.