Rory Mcilroy Diamana shaft, which model?

Does anyone know what kind of Diamana shaft Rory is using?  I know it is a prototype, but is it more like a White Board, Ahina, or maybe the new D plus.

If anybody knows for sure, feel free to respond. 

I believe he uses a rombax

The new d+

No specifics just the it is a "prototype" model. It may be an early release of the D+ but it is not the current retail D+ or ahina since its missing the flowering on the shaft.