Alex says the route "is a combination of Salathé, Albatross, Son of Heart and Heart route", plus some new variations to link the freeable sections of the existing routes.
Huber says that besides some new bolts at belays, no bolts were placed for the new route. Pitons and bird beaks, placed during the first ascent on the new variations, have been left as protection for the freeclimb.
You can read more, including topos and some pics, at the Huber brothers' website
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