Tiger, I have some questions on your setup:
1. When you were putting the coldplate of the freezer into the liquid, did you have to keep the pipes going into it in the orignial positions? As the freezer normally sits above the compressor, did you bend the pipes leading into the freezer to allow you to position the tub beside the compressor?
2. Did you ever think of using two of the freezer systems in the one tub to chill the water? Seeing as they are cheap, you could do it and really chill the water. Or do the compressors eat up to much electricity to use two together?
3. If you made your setup with two freezers, and then used a 220W pelt and coldplate bewteen the block and CPU, what temps do you think it could get? The water temp may go up more, but it should help get the core well below zero!
I know a Lot of insulation would be needed, but if you are gonna go this far, I think a bit of extra work insulating the system is ok.
I think I will start planning this for when I get my Hammer system.