As long as the reshaped tips mimic the original, you should have a good running prop. I don't know what your expectations are, but I think the optimum treatment is to soak some thin CA into the TE of the blades from about mid span on out and sand them to a razor edge. I only work the top of the airfoil. Some of the benefit might come from reducing excess mass as well as any aerodynamic gain? If you've got a good handling plane that doesn't tend to ever nose over, then prop work can be worthwhile, otherwise I would just do a quick chop and balance job and call it good.