Agreed, adding ailerons is no big deal. I did it when I built mine. I went with "barn door" ailerons (like a cub) rather than full span strip ailerons. I also made mine with a 2 piece wing. Not that difficult to add wing joiners at the front and rear spar locations. Unfortunately, due to the heavy dihedral, you can't use a straight wing tube. Instead, for the joiners, I used bass wood or poplar cut in a "v" shape to match the dihedral (probably 3 rib bays into each wing), with the height and width to match the space between the top and bottom spars. If I remember correctly, I then used 1/16" ply as shear webbing on the front and rear of the spars to create a box for the spars and hold it all together. Waxing the wood joiners helps them slide in and out easier.