A challenge that will certainly keep all sphincters tightened and attention focused.
I would be sure and saturate the substrate with CO2 to make sure it is not contaminated with terran atmosphere.
And any water should be saturated in CO2, to make sure O2 and N2 is minimized.
I would wonder if overhead lamps for heat wouldn't be more meaningful for heating?
Refrigerating it shouldn't be too tough.
Could remote video links be used to keep the explosive recompression risk minimized?
Ed