I think you are talking about using the existing linkage and just connecting one servo for left aileron and another servo for right aileron. If this is what you mean, it will be difficult. There is not enough room between the linkages for both servos to go side by side, so that forces you to put them further forward , turn them on their side, put them outboard of the linkages, or maybe a combination of the these. If you put them further forward you will have to add another linkage to connect the servos arm to the existing linkage. I don't really think you would have room to put them outboard of the existing linkages and still fit into the fuselage without interference and still have enough articulation. On a larger plane you might be able to do this, but pretty difficult on this plane. Not saying it's impossible, but you will probably pull your hair out trying make it work.
Front and back will also be a challenge because the linkages are at the back of the wing saddle so there's no room to put one of the servos aft of the linkages. This means only one of the linkages is going to line up with the servo arm. This is going to force you to modify one or both linkages, and if you only modify one, that throws another big kink in the geometry. This is why I think it would be easier to forget about using the linkages and mount the servos in the wings near the ailerons.