The Creality 3d Printer takes around 20 minutes in the episode to build a print, in reality a 2015 3d printer would have taken several hours to produce a print of that size - even with advancements a 2023 printer would not produce a print of sufficient quality in that time.
At 34:26 when the other guard steps out of the elevator, there's a sound effect of elevator doors closing but you can still see the elevator doors open and not moving in the corner of the frame.