As one would expect from a Mizuno blade the 919 Tour features a Grain Flow Forged HD (high density) construction from1025 Elite carbon steel for the soft responsive feel aficionados demand.
However I’d say it’s unlikely that a new iteration of the Mini is coming any time soon. Modern fairway wood designs like TaylorMade’s M3 and M4 for example are so good and so long that former Mini players can simply find the right fit and most likely get the same or even better performance.
None of the above matters if you can’t aim your putter correctly Experiment with offset and straight-in hosels — you’ll definitely aim one type better than the other. Then check the alignment marks. Do you prefer lines that run parallel to the target? How many lines? These are important questions that can best be answered through a proper fitting.