Damn! 484 grams for the crankarms, SpideRing, spindle and bolts! Stiffer than the current Hollowgram SL with normal chainrings bolted to a separate spider on top of that.
The obvious change is the SpideRing, a one piece 3D forged then machined spider and rings combo. Available in compact 34/50 or standard 39/53, optimized for 10 or 11 speed transmissions.
The arms are still 100% machined in two halves that are bonded together but they also get a bit lighter (obvious is the shaping near the spindle that follows the BB30 spline shape) but it also gets stronger/stiffer. Not shown is the new spindle, also trimming some material and also getting stiffer.
Too bad it wont be here in time for my new bike project, I'll have to endure the current Hollowgram SL...
Also a good news, there is a new cheaper version of the Hollowgram with 3D forged arms to reduce the price. These will mostly make their way on middle range bikes instead of crappier cranksets from FSA.