Once you give a spin have to let us know if you notice a difference between the Aluminum and Stainless Steel versions there Mark.
Congrats. I paid my invoice for the head only today as well. JR they had a email list of folks that had asked them to produce this as an option. I still hope they produce the OC base plates.
Just in time for NB '16. These will be priced quite a bit below the SS ones if memory serves me right.
From my understanding this was the first limited production run with regular production beginning at some point next year.