Still waiting for the thermometer from Hong Kong. I could stick this old F probe in there but it's a lot of work to remove the block and all and I'm not sure just how accurate it is. EDIT: it doesn't even read negative when I stick the probe in the bottom of the chiller @ -10 F
I must stiffen up the gpu loop mix a little as it froze in the lines last night, but no slush on the evap today.