Fit the support centre bracket between main plates. This has doubler plates that have been pre glued to the inside faces.
Check alignment using fixed rigid between holes .. this is key so that the aileron movement of the torque rod is smooth axially.
Fit Torque tube and ensure ease of aileron movement and no end float
Confirm hinge washers
I had a slight problem with one of the brackets moving fractionally when I came to remove the temporary rivets and pre glue them onto the torque rod. The plan guidance says you may need to slightly widen a hole to get smooth movement and a minute amount of filing of the centre bracket leaves the movement finger light !