Translations:KAVAN DINGO A3 Glider Kit 796mm - Instruction manual/31/en

From KAVAN RC Wiki

Final assembly, Centre of Gravity (CG)

Secure the side towhook 36 to the left side of the fuselage using two screws 37 – refer to the building plan. The towhook is adjustable – you can move it forward on a windy day or backward on a calm day in order to achieve nice and steady climbing during the hi-start. Tie the wing and horizontal tailplane to the dowels on the fuselage using several loops of the supplied rubber thread.

Important: One loop is never enough!

Mark the position of the centre of gravity (refer to the building plan, marked with a dart) to the bottom of the wing seat on both sides of the fuselage using a permanent marker or a thin strip of colour sticky tape. Support the wing of the model with your fingertips in the centre of gravity position. The fuselage should be level. If the nose pitches up put in as much of additional ballast (not supplied in the kit) to the nose as necessary (you can use small screws, modelling clay etc.). The correct balancing is essential; incorrectly balanced model will be difficult to set up or unable to fly at all!