Korg C-5000 key repair

I ordered white key hammers for my korg C-5000 (three of them). Is there a video that shows how to replace these hammers? The keys that are a problem are the D and G keys above middle c. There isn’t anyone within a 30 mile radius of Yelm WA that repairs those keyboard. So PLEASE ANY HELP that can be given will be greatly appreciated.

Bev Russell