It's probably time I started this thread. I am about 18 months into the evolution of the Thinktank ----- I am designing the thinktank 2.0 to be a submersion rig , with pure alcohol (anhydrous isopropanol ) as the liquid. This IPA will be pumped from a large vacuum insulated container of my own design (yes it's a keg).The active coolant will be dry ice . The entire system has been designed and built with a spec of -80 C in mind. I have rebuilt the thinktank 'tank'.I have taken the original glass tank , and built and inner glass tank inside it , using Borofloat 33 siliconed together using RTV 157 aerospace grade silicone...The two tanks are designed to be separated by an active nitrogen blaket . Here's a shot of the new tank : --- The original lian-li pc65 has become part of something bigger : Here's a shot of the back with the vents : ----- So..... I have every major component I need to build this.....I am doing it now. The first rig that will go into it : Asus p5k-se Intel e6600 Mushkin D9 ram , 2x 512Mb Video card yet-to-be-determined. The psu will be external.... ----- Cooling systems specs : The IPA will be pumped using this pump : That's a 316 stainless steel ,self priming pump , 3/4 inch I/O.... The coolant lines are all "Vacuum Insulated". The pump will be housed in a positive pressure N2 system...... I expect the worst temps I will get will be below -60 C . ------ I'm not far off the first test runs......I actually have every major part in my possesion...just gotta put it together. Next pics: the rig running. cheers !