Replacing the fan in ReadyNAS Duo - possible?

Javik wrote:
This isn't a good way to do it, because the hub (center/motor) of your large fan is blocking nearly all of the vent slots for the 60mm fan. You are just pulling air through the tiny sliver visible around the hub, and the old screw holes. The blades up against the flat sheet metal don't do much of anything.

That's not true at all. The fan pulls out air from any hole it finds to pull from. I have thoroughly tested its capacity to ventilate and have a free flow of air from the inside of the box, and saw no problem remotely signifying what you describe. You also miss the fact that I used sillicone-kit to make the fan not pull air from other holes than the ones linked to the insides of the unit and adapt the size of air-flow. Of course you can pay up heavily to get pre-packaged plastics (like the ones you try to sell) that do the exact same thing, but I don't need them, obviously.

Furthermore, the HD temperatures I get are waaaaay lower than those from using the stock Crown fan that came with my RN Duo. Not to mention the noisefree operation I have with this fan. Plus, I can set it to run at 1100 RPM and still my HD's stay under 29 degrees Celsius. Conclusion:
Using a large fan, the way I did, is not going to be a problem whatsoever.