We have never had the chance to run kief in our machines yet. If we did the cycle would need to be 3 times as long because of the higher potency of the kief.
With California’s tax structure on transfers of trim I could see people kiefing all of their trim to reduce the tax burden. Currently all we extract in California is old mountain mix and bunk flower lots. I have found a pound or two out of hundreds that would even be worth a terpene extraction.