The issue with repairs being stronger than the original is most evident in sever cases where the wing can no longer flex, thus causing fracture points at each end of the stiff splice and beyond. Say for example if you broke one the wing in the middle, if the repair area is very stiff much of the flexing under load is transfered to the remaining structures towards the tip and towards the root of the wing rather than spread evenly along the structure.

BAX's reply is a pretty good piece of advice. The only reason I mentioned the strcutural issue in my first reply was because I have noticed a tendancy for some to overbuilt the wing during a repair, Strong is good, some fleixibility is good, rigid is bad. Your model will probably never experience extreme wing loading unless you pull off some wild aerobatics. Dont worry, go fly it.