In my experience with Autos that don't amber (some do and some don't --- even different phenos I had from Himalayan Blue Diesel, some phenos did, some didn't) the ones that don't amber I let them go until they are almost completely milky. I would watch the trichs in that case... Not necessarily go by days or seed bank times. Those are always "ideal breeder situations" and none of us are goin to be able to match that completely. It's just a reference more than anything if you ask me... I've had plants finish in 7 weeks... earlier than breeder times. So just keep Hawkin' your trichs man and wait for mostly milky.
GO BUCKS!!!