So I have now talked to Max de Jong and I should make some corrections to the above description.
1) the pitch lengths are all 50m station to station. by this criterion Shaun and I got part way up p6 of the 22 pitch climb
2) Scott Flavelle had tried this first and fell off p6 on a pin and bent it. The line then passed to Carlo and Max. Scott, Carlo and Max were never all up there as a party of 3.
3) I had not realized before just how impressive this ascent was. I had believed or misunderstood that it was a mostly sieged aid line. In fact there are: only 7 moves of aid on the whole line; and, only 17 lead bolts (aside from belays) on the climb.
During Max's solo attempts on and completion of the route there were no fixed ropes. He was up there free climbing on clove hitch belays and equalizing knifeblades so as to avoid drilling. The 2 attenmpts that failed before the successful push were due to weather (full tale of epic rappel descent without shell in snowstorm, frostbite etc will not be garbled by second hand telling here).
The climb does apparently improve a bit above where Shaun and I bailed but is definitely a basalt dyke with loose blocks the whole way up. There is a lot of delicate stemming and so on higher up and knowing what holds to not trust is a required skill.
The whole thing sounds pretty impressive and gnarly. As for the Unfinished Symphony reference its a bit of a red herring with regards to this route anyways.
Thanks for the beta Max