Lesath,
I.ll see if I can get this right for you. On a flyingwing aircraft The ailerons and elevator are called elevons. Meaning that the ailerons, elevator work in unisons to control the attitude of the aircraft. Ailerons for left ,right control. Elevator for up down control. There is more to this but I'll stay away from that for now.
To answer your question. On a flying wing since there is no fuselage the action of the elevons is more toward the extreme end of the spectrum, sort to speak. Takes very little input, movement of the surface, for an extreme reaction. Sudden rolls or sudden pitch. Which can end your day in a hurry. Reason is because the CG, Center of Gravity has a very narrow margin spanning the wing. Also the fact that the entire body is a lifting surface. The CG should be in my quesstamate for better control in flight, Forward rather than toward the rear? Also the elevons should have more upward travel than downward travel. I hope I did'nt just confuse you more? I'll try and explain this: If the center of gravity is moved slightly forward, slightly the key word here, the nose will have a tendency to drop or pitch down, This is true for all aircraft, so to counter this the elevator needs to have more upward movement to help the wing climb and, maintain trim for level flight and landings.
You won't need more down travel because of the forward CG. The plane will already have a dive tendancy so you will need less down travel.
The down side of a forward CG is that it increases the landing speed and stall speed.
Hope I helped and not confused you more. Remember: Flaporons: the ability of Ailerons to act as Flaps... Elevons: the ability of Ailerons to act as an Elevator.

ISIS