Thanks Shadow!
With a little thought, you could arrange the cooling loops to give give you room for up to 8 HDD's. I'm also thinking about changing the design of the cages so that it's possible to fit 5 drives in each cage.
The case will be 240mm in width, so you could easily fit two 60mm rads in that configuration.
I use Google SketchUp for modelling and Kerkythea for renering...
http://i277.photobucket.com/albums/k...seDesign-1.jpg
Bookmarks