I have another short run of these parts coming up next week.
If willing, please look at this video and make any suggestion on what you would do different. Just keep in mind that if pushed hard, the fins will bend. Also my machine is in my garage. It points right at my incredably understanding neighbors home office. So it can't more noisy than it already is.
http://www.youtube.com/watch?v=vM9rIaNMyBk&feature=plcp]Heat Sink Machined on a Tormach PCNC1100 - YouTube
Sorry about the not so good production quality. I'm low on time and basically suck at it.