Well, the three pumps were making a weird, low-frequency noise that I could stop by pressing on the center of the vertical panel. I tore the system down and will be getting in some 1/4" sound-proofing material tomorrow to place on that panel. Hopefully that will stop this weird noise.

To be able to apply the sound-proofing material easily, I took apart the case. Here's a picture of the case with all the panels out:



Here's a couple of pictures of the pumps and the pump shelf:




Sunbeam Fan Controller: This is a great little fan controller that can control up to 20 watts on each of the four channels. However, the LEDs on the front are way too bright and can light-up a dark room! To reduce their brightness, I installed a 10K-ohm resistor to the center lead (Gnd Lead) of each of the LEDs and this worked great. Channel 1 controls the fans on the vertical MCR-220 radiator to the left, Channel 2 controls the fans on the MCR-220 radiator on the top panel, Channel 3 controls the fans on the MCR-320 Vertical radiator to the right, and Channel 4 controls the remainder of the fans in the case. Thanks to Jason Padrick on OC Forums for this idea.

Here is a picture of the placement of these 10K-ohm resistors:



I should have everything back together this weekend.

Cheers!