The whole point of automidhandle is that it automatically sets the handle to the middle of any objects that are drawn from then on. You shouldn't need to explicity use SetHandle to make it work.
Also I'm not sure if automidhandle is to do with handle's given to newly loaded objects or ones you create yourself.
Also I'm not sure if automidhandle is to do with handle's given to newly loaded objects or ones you create yourself.