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.

Great! Cant wait for a 913 D3 8.5 w/ D+ 72 and 913 F 15 w/ S+ 82. Very excited for the new line to hit store. 

The 910F and 910H tips are not interchangable. The tip in the "F" is a 335 and tip dia. is smaller than the "H" which i believe is a 355. Know from some personal trial and error.