Unfortunately, "...zay haff zayr vays!" It's not that much of a trick to jam a plea bargain up anyone's nose.

The descriptions in the media are 100% garbage. IF - he had caused a single engine to accelerate, the aircraft would have banked (rolled), only; as there is a yaw-damper system which would have prevented a yawing motion, in the fashion of a boat rudder causing a "sideways" motion. Boeing meters all materials down to the gram; they don't run extra wires or provide bizarre data connections. To have gained any "control" over the aircraft, he would have needed to access data cabling under the floor - or gained access to the E&E compartment, where all the "black boxes" reside. There are a lot of easy ways to "mess" with an aircraft, without any sophistication - which can't be addressed, for all obvious reasons. Alas, America, I love her; and I miss her so!