I have my Quark opened up again. I'm going to need to secure the Fets to the heatsink since the boards are just sloshing around inside the case. Here is a picture of the inside of the heatsink.

It has a piece of Aluminum secured with what looks like a heat pad. So it goes heatsink, heat pad, aluminum and then heat pad stuck to the Fet's. Maybe this is part of the cooling problem. If the Artic Alumina is better than a heat pad, I would probably remove the 2nd heat pad too. Are heat pads very efficent?

Here is also a view of the top of the boards. The heat spreader does not touch the heat sink.