This is just an idea and if its dumb please just try and not ripping me a new one ()()....
Thanks again guys.
All kidding aside if you want to do a mod buy this fan . Buy only one for the pull side keep the stock for push.
http://www.amazon.com/Silverstone-Cooler-Computer-Cooling-FHP-141/dp/B00A460TK6/ref=sr_1_1?
lower the freq from 218 or 225 down to 212 or 206
the gear will be very quiet. runs cooler here is a chart of 2 s-3s at freq 212
This pair of s-3's has run none-stop since July 23rd-26th 2014. They are in my friends office. More then 10 months run time batch 1 machines