How does that work? Do you have to send him the coins you want customized and tell him what you want done or just tell him what coins you want and he will get the coins himself? I ask because I live in Korea and it would be nice to have a few gaffed coins of the local denomination.
Personally, I send him the coins I want to be used and he will make the gaffs I ask him to. You can also have him supply the coins, but the cost goes up and you don't necessarily get to choose the condition of the coins.