Heatsink Top:
What may look like 216 individual 1mm x 3mm wide fins is actually 18 sections. Each section is mounted into the base by mechanical means, and possibly by some soldering though it is difficult to tell for sure. Pay close attention to the excellent clip design. Rather than cut out a path through the fins the clip goes in between two sets of 3mm spacing to minimize impact on the overall performance of the cooler. Each of the fins is typically spaced on the order of 2mm around.

Side A:
The aluminum shroud keeps the base of the Delta fan about 4mm above the tips of the fins. Measuring 15mm tall the shroud leaves 17mm above the base plate for air to exhaust from.

Looking at the base plate it is easy to see that there are still spaces around each of those fin sections - despite the plating operation. The base plate is 6mm thick and under cut 1.25mm to clear the socket cam arm.

Side B:
With a heatsink that is heavy like the Silvermountain it would have been nice to see it use more than one notch on the socket to keep itself in place. While the clip does require a small flat head screw driver to engage, it works well. Additionally, the clip has been made so that it will stop the heatsink from shifting from side to side when installed.

On a side note, the silver plating really looks nice from this angle - very shiny!