The method of construction of the vertical stabilizer is identical to the horizontal stabilizer :
Assembling the rear spar with its reinforcement and attachment points for the movable part
Deburring and flutting then assembly spars and ribs ( my son gave me a hand :-))
Here is the result
After assembling the skeleton of the vertical ruder with clecos, the holes are drilled with drill bit size # 30 .
Next step : deburring all parts + assembly of the skin.