Hi, I'm writing you the same thing I wrote to Paraz, you'll encounter many opinions here, I'll give you mine :) I generally use topping and defoliation with my Autoflowers. After topping, I start with LST, and for me, that also includes defoliation. And I believe I achieve very good results with it. When I didn't do this, my buds were smaller and the yield was significantly lower. I've harvested up to 170g with relatively small Autoflowers in 10 to 12 weeks. You can check out my diaries, there you can also see how much I defoliate and when exactly. Otherwise, feel free to reach out. The last one that had a nice harvest was the Ghost Train Haze with 130g after 10 - 11 weeks. An exception was the Membrana, which was only ready after 20 weeks but then had 240g. But overall, I personally think that defoliating the leaves that cast shadows on the buds allows them to grow better. And as a second argument, defoliation in the lower area improves air circulation.