Here is how I would work out the gear area of the wing:

1) Remove the main gear
2) Cut the lower skin around the gear bay to open it up from the front spar to the rear spar and from the wing root rib to the third rib. That would open up a large area and allow you to work out comfortably.



3) Un-glue and remove the gear plates
4) Make a wing root rib reinforcement plate with 4 mm aero ply. This plate should be glued on the inside of the wing and have the opening for the gear strut.
4) Reinforce the area between the first and second rib with a large piece of 200 grs/m2 carbon fiber fabric. It should cover the front and rear spars as well ( U shaped )
5) Reinforce the area between the second and third rib with a large piece of 200 grs/m2 carbon fiber fabric. It should cover the front and rear spars as well ( U shaped )
6) Make a U shaped carbon fiber flex plates with a 2 mm carbon plate and 2 layers of 2 mm aero ply in sandwich. They shall NOT be glued together. The plate shall be running form the third rib up to the wing root rib. Make two square holes in the wing root rib to hold the tips of the flex plate. hold the flex plate from the third rib with two screw and a hard wood block. DO NOT GLUE IT.
7) place hard wood blocks around the gear bay opening to screw the lower skin back ito position.

That would reinforce the wing tube boxes as well as the whole gear area, and offset the torsional efforts into the flex plate...