Why xre?
Question; those who have drilled and used screws for leds to the HeatSink ; I my case 216 Holes to be drilled at a minimum .. Is it preffred to do drilling or glue it to the Heat sink ?
I did 288 tapped holes using a 18v DeWalt cordless drill for both the drilling and tapping. It is actually pretty easy to tap using a variable speed drill with a 4-32 tap. You just have to be careful and it helps to keep the tap lubed. I just used WD40 that I dipped the tap into about every 4th hole. Took me about 3 hours or so to do them all. Broke one tap but no drill bits. May not be the easiest way to do it for all but it's fast if you can pull it off.
I also tried self tapping screws but it was a lot of work to get them all the way through 1/8" alum before stripping the phillips head.
This means the stars would be almost touching. IMHO a fan would be required.1.1 x 18 Heat Sink to small .. to hold 18 of them[LEDs]