Rolex spring bar hole repair

[Rahul718]

Just wondering what the definitive stance is on spring bar hole repair is. I’m in the process of purchasing a used 16610 and while it does not look polished (based on the seller’s word + my own evaluation), the spring bar holes are slightly enlarged. I’m not sure how that happens unless the wrong size spring was used. Either way, I’m looking to purchase this and send it off for service as soon as I receive it. In addition, I’d like to get the spring bar holes repaired. I know the fix is laser welding, but is this a permanent fix, provided the correct size spring bars are used? Will the repair center use the same 904L steel? Last question, is this something that the Rolex service center can do or would I need to send it to a 3rd party? I just want the repair done right and I want it to last.

Appreciate any insight