Kelly has the correct answer, and on the BVM website there is a tutorial for the cracked wing skin fix. No need to remove the skin either. Your addition of the carbon blade in the leading edge "D Tube" area isn't the solution to the problem, either.
Extra weight forward of the problem area won't help the flex plate from cracking the skin.
You did not mention whether you have a Balsa Bandit or a Super Balsa Bandit...Both are older.....I will assume it is the original version, which I always refer to as the "Classic Bandit", as you can see the crack in the photos.

When the "Super Balsa Bandit" was introduced, a optional construction step was added to strengthen the upper wing skin to prevent cracking during hard landings. Page 18 of the manual shows the optional text concerning the addition of a piece of 6 ounce fiberglass cloth immediately above the retract unit. The "Classic Bandit" manual does not contain this addition.

When I built my last Super Balsa Bandit, (Which I still have, updated with composite wings now) I vacuum bagged a square of carbon fiber cloth to the inside of the skin before construction was started. This really helps.
Your second photo shows the crack above the gear unit without the glass inside patch. I recommend adding some 6 ounce cloth or a patch of 5.7 ounce carbon fiber cloth to stiffen the area above the gear unit. Go from rib to rib, forward to the main spar, and aft to the aft spar if possible. Apply the cloth to the length of the crack. Adhere it to the skin with epoxy resin.

As for the top surface, please follow the link to see the method we recommend for patching a crack on the outside of the wing skin. The link explains all of the steps necessary to accomplish the task. The method includes all wings, balsa and composite.

http://www.bvmjets.com/Pages/skin_patching.htm

I hope this helps.