The Marsblade inline chassis is for 'training' not in game use.
But speaking of inline, despite this new holder sounding intriguing I am always skeptical of moving parts being associated with a chassis or holder. I've been around long enough to see the quikchange or whatever it was called where you could swap holders from ice to inline, the rocker chassis, mission vibe chassis, & sprung chassis. All sounded good in theory but with the moving pieces it was only a time before something went wrong or broke.