18×8.46 Drilled and Tapped Heatsink
$106.25
Drilled and Tapped Heatsink can have 66 LEDs mounted via 4-40 screws.
Heatsink can also take advantage of BJB Solderless Connectors.
Use Thermal Paste between the star and the heatsink.
Heatsinks are discounted when purchased in a kit.