These 3 parts (makes 4 pieces) replace the existing ones to adapt it to use a standard 60mm Fan. No holes are printed into the adapter and must be drilled since each fan mount is a little different. The fan mount itself is different and positions the fan higher than the original 40mm.
The new fan must be mounted on top in order to have bed clearance, so you must also print 2 copies of the Fan brackets since they allow the fan to be mounted on top and adjust the fan angle slightly up.
There is no need to replace the 40mm fan, there is no added benefit unless you are switching to a more powerful fan. I damaged my original fans sockets during original assembly and decided to use this to replace it with some of the dozens of existing 60mm ones I have in the scrap pile. I really recommend using a half height "thin" fan. I have been using a 12v .22a Evercool Half Height CPU cooling fan with no problem.
If your printer is calibrated correctly, these parts will fit snugly together. Mine managed to snap together and have held for a few days printing with no glues or other adhesives.(so far!)
If your printer is slightly out of calibrations, you may need to shape pieces with sandpaper/files and/or use adhesives (like the originals)
You need to print 1 of each of the 3 parts except for the fan bracket, you will need two pieces to complete this part.
When you have the 2 fan brackets and the fan swivel, insert them exactly as the originals. They will initially be a very tight fit and may need to be forced. Then you will need to rotate the swivel, which will loosen up quickly and self adjust to the fit.
Mount this assembly onto the 60mm Fan Base. You may need to sand or shape the pieces to fit and may need glue or adhesive to hold it. If it is a tight fit, like mine, just press real hard and the friction fit will hold it together without the need for adhesives.
Place your fan right on the top of the fan brace (NOT underneath as in the original!) with the edges pressed tight against the flat edges of the fan brackets. Then drill the screw holes that match your specific fan holes alignments. Start with a drill bit smaller than your actual screws so they will have something to grab onto.
That's it. Attach your fan and your are ready to go!
Make sure that your controller board or power supply can handle the difference if you alter the stock setup. Altering the electronics may damage and mostly like will void any warranty on your 3d printer!