Well I have some Dutch Passion Flo almost done now, and I'm on 38 days!
I just clipped the bottom buds of one of the two plants I have - they're definitely done. I reckon I can leave the rest of this plant until Saturday, which will be 42 days, and then I'm chopping. This is the 'purple' pheno, which has had all sorts of weirdness - leaves browning and shrivelling right up after two weeks of life, and the buds turning purple two weeks ago. It's a really weird plant.
The 'green' pheno I think will be done at 49 days max - the calxes are turning purple, but most pistils still white. It looks incredible! I'm taking pics tomorrow and will post immediately...