Doubler strap shows where to installed doubler strap location(inside wing)

 
Reinforcement before riveting
 
Reinforcement after riveting

  Remove original wing tip
   Use string and tape to front spar and contour extension
  Picture show extension to low

Picture show extension to high

Picture show extension straight

Keep string even spacing top and bottom

Trim extension to clear aileron

Trim and rivet extension trailing edge even with aileron and wing tip

Reinstalled strobe bracket and power supply ( if equiped )

Cut a new inspection hole

Riveted the doubler

Rear spar angle stiffener location

Picture show where to installed angle under tank cover

Rear angle stiffener after installed under tank cover

Final installation without paint