-=(blue)The culprit, possibly Deborah as she has intimate knowledge of the device, was hiding inside the base, which had been modified. Under normal circumstances, the mechanism wouldn't fit very well, but Debby knew something through playing with the 3D models that the others hadn't worked out just yet- how to activate the mechanism.
She hit the on button and the machine reconfigured itself, altering its size, and then all Deborah had to do was catch it and replace it with a card.
How did Debby even make it into the base? Simple: through the air vents that are connected to it for air regulation.=-