Hey dean. I was going to do something similar by using an large uninsulated direct hot water cylinder (
link), but I never did track one down (though I didn't try too hard).
The setup was also going to have heatercores so I could detach the tank and go to a lan party or something. But budget said a new rig would have to wait another year so the project was shot down. A bummer too cause G4 Storm at the time was I believe about $52.

I did get my hands on a MD20Z before the cut off though so I'm not too upset.
Let me/us know if you ever get the setup you described together!
DrCR
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