Sorry Imurg but I would send it to Ping or take it yourself as your not that far from Gainsborough.
But try using it first. You might find you cant tell the difference
The clubs that are cast are much more brittle than forged clubs. After I saw my old head pro crack an Ping 8 iron I vowed I wouldn't risk it.
If you do get the pro to do it, make sure he will replace the club FOC if he damages it.