Case Design for Liquid Cooling

[Mick64]

It's rolled and crimped on the 1mm, but seriously, you dont want the case to be overbuilt - its just a waste and increases cost. an all 2mm alu case would be very heavy by case standards, especially in such a large case size

Of course, if 1mm or 1.5mm is adequate, then that gauge would be used. Like I said, I'm no expert. I would leave that sort of decision to the fabricators....