From the manual, ver batem;
In the basic setting for normal flight, the elevons must be up (reflexed) by about 5-7mm, measured at the root trailing edge.

All control surface travels should be measured at the trailing edge. Maximum travels should be 30mm up, 25mm down.
Aileron alone +/- 12 -15mm
Elevator alone 20-25mm up
20-25mm down.
Hope this helps, Randy