Quick note. I checked this last night around 8ish.
The temp was up to 3.4° C, and the pressure was sitting around 800 PSI. I swapped the Ice Bottles, and watched the temp Drop to around -0.7° C. The pressure maintained around 800 PSI.
I will try to recreate the slow leak that i discovered last week. I know how I created it, so those conditions are what I shall Attempt to duplicate.