Just to reiterate a little, the report says: "Figures 1 and 2 below depict the insulated device used for the experiment together with three spare devices."
It is obvious from Fig. 2 how big the pipes under the insulation are. You can peek and see most of them where the H2 valve comes out. Fig. 4 shows the insulated device with the top insulation removed. I do not know if they went ahead and unwrapped the whole thing, but that does not matter. You can see most of it from this photo. You can tell from the thickness of the insulation and the size of the pipes going into the remaining insulation, and the parts of the lower section uncovered, that this is same kind of gadget as the other three spares. It is conceivable that Rossi hid ~100 ml under there instead of 50 ml, but that would have effect on the conclusions. - Jed
