Came to recommend the brass shim Howard suggested.
Also, if you don't shim it, you will find it difficult to insert in center, will probably want to slant a few degrees. That alone, if resting one side on the sharp hosel, can make this thing crack. Do your best to center it. Even if you have to wrap some copper thread or fishing line around it while epoxying. Do your best to center, maybe install just the adapter, not with the head on it.