[bigben2k]

After much thought, and with some numbers from Cathar's experiment, I've come up with this fin design for my #2 block:

Name: "RADIUS"

Fin count: 32
Fin width: 0.9 mm
Fin height: 5 mm ?
Channel width: varies between 0.6 and 1.2 mm
copper/channel ratio: varies between 3:2 and 3:4. Average 5:4.

Since it's a center inlet, I'm still puzzled about how to make it all work. First thought: lower the fin height in the middle.

The difficulty of course, is making it! My first idea is to mount a 0.6 mm cutting disc on a shaft, and move the block around. It would not make the center fins squarely cut, but since I might lower it, I think it'd be ok if it cut into them some.

Thoughts?