A maintenance drone or a rigger-run cleaning robot? Either would be a problem. The dog-brain in a drone wouldn’t be bright enough to recognize him, but the stupid thing might try to clean him out of the duct, a process that would be most painful. If it were a robot, a rigger could ID him as an intruder and would report his presence. That would make departure much more complicated and cancel any chance of returning another day. He did not want his hole through Grandmother’s security sealed; it was his doorway to fortune.