I see you've grown a lot of greenthumbs gear, whats your number one most potent strain from him? And have you grown his endless sky? I've heard its not as good as it used to be, dont know if that's true or what?
I grew Endless Sky not too long ago and while I have no idea what it "used to be" mine was strong and tested in the 20% range after 44 days.
Very hard to say most potent but his ECSD and Iranian Haze are really strong Sativa doms. My IHaze tested at 26 or 27%,
The Trainwreck tested at 25%. His Turkish Cookies is also rally strong in a couchlock way.
And the right Oh Zone pheno will peel the paint off the walls. Lab numbers don't tell the whole story and a better grower will get better results than I.