The first time I climbed the north ridge it was July 2nd and there as ton of snow on the ridge. The slab pitch was completely covered... Much drier year.... Looked like a good climb... and fast...
I climbed it in July one year and had two tools which was nice. But then again, I suck at the French thing...... very cool climb.... should go back some day...
Given the size you have given and some density that I found online for rhyolite, the approx weight of the flake is over 7000 lbs... In one word, scary esp for a belayer....