Not really. On models with notches as standard, like the Model 5, the notches aren't costing you $25. So deleting them would just mean you pay the same price, I assume, but don't get the notches.

Then the shop theoretically saves an infinitesimal amount of labor for not having to file the notches, though I'm sure that's wiped out by the labor of shaping the second part of the hilt.