The weak point is where your CF tubes go into the balsa strips at the side. You have a minimum of material above and below the hole, and balsa is not good in shear with the grain. If those will be tied into the fuselage sides in some way along their entire length, they may be ok, but I'd still put reinforcements above and below the holes. Make sure the servo cannot twist in the vertical plane under load.

This leads to another point. My experience (and some other peoples) with DEPS in balsa airplanes is not good. Every flight means another change in trim, and you HOPE you get it right on your trim pass because you are real busy after that. The first flight of the day is also an experience, as it WILL be out of trim, especially when the humidity or temperature has changed a lot. I will not build another balsa pattern plane with DEPS. It is easy to set up if you have to change servos. but the flight to flight trim change is a real annoyance. Two servos in the tail is my standard from now on, because the trim never changes. DEPS seems to work ok in composite airplanes, given they don't seem to expand and contract as much relative to the CF pushrods.