Talk to Paiste. I don't know how much they will be able to help, but their advice can't be worse than cutting the outer edge off of your hats. Cutting cymbals down in size messes with their sound, a lot, and not in a good way unless you also get into lathing the top and bottom of the cymbal back down to a proper taper. There are very, very few people who can mess with a cymbal and get good results.
602 SE are amazing hats, and pretty pricey. Do you want to roll the dice and take a chance they will come back sounding, well, very different?
If I may make a suggestion, have the chip ground out so that it will not spread any further and carry on playing them.
Good luck with whatever you decide, let us know how it turns out.