I wouldn't defoliat just yet, maybe some lst, tucking or I've seen people tie the big fan leaves together for a few hours a day to get light to lower growth.
I've been defoliating like crazy (too much probably :) In the future I will do 2 big defoliations 1 beginning of flowering and another about 3 weeks into flowering. Remove the odd big leave here and there if blocking lights. I've grow from this breeder and started training I've of the plants very early age from it will.
Doing a great job so far. Happy growing