I've found a photo from the ASRA trial. It shows just how cramped the space was in the tanker Herc. The photographer is stood on the ramp in the space between the HDU and fuselage wall that the observer's seat would be stowed to allow the ASRA (visible between the HDU support frame) to be rolled into the doorway. Just forward of the doorway can be seen the stowage for the pyrotechnics. They may have been handy for the observer but as can be seen they were also close to the Andover tank.
