Just a post from another happy customer. Item shipped and arrived quickly, and was cake to install on my JP2 Pro. Thank you Vireland! I play my pins with the volume quite low, so the difference with this installed is just night and day.
I honestly think it's pretty ridiculous that Stern thinks the stock fans are ok; in any home environment they are shockingly loud. I thought something was wrong with my machine the first time the stock fan kicked on because it was so loud. Or to put it another way, I'd classify this upgrade as essentially a requirement for anyone buying a Stern pin for home use.
One tip to share, the white glue holding the fan wire in place was very difficult to remove on my power supply, and as I was working with it one of the capacitors near where the glue ran proved to be frighteningly easy to move. It was pretty clear to me that if I bumped the cap more than a few times while trying to remove the glue that one of the caps legs could easily snap off.
While I was worrying about this, I noticed that the wire itself from the old fan could easily slide back and forth under the glue. So I went ahead and just cut the wire off the old fan on one side so I could simply pull the wire out from both sides. Then the new fan cable I just ran over and I didn't have to worry anymore about trying to cutting or scrape the glue off. Perhaps not a recommended way to do this install, but if you end up where I was it's definitely worth considering.