I have went to YouTube and that is why I am unsure.Yes you cut fan leaves. They cover bud sites from light penetration. If you are unsure go on YouTube and look up Kyle kushman on plant defoliating and chiropractic techniques. You don't want all that larf on the bottom of your plant. It only takes away from the main colas. Just my 02 cents.
There is more then 1 way to do things.
I like to collect all info and then experiment and eventually come up with my way.
I definitely will be heavily cropping 1 plant to see and another with nothing.
Im curious if there are some on this site that can show there plants heavily cropped and others untouched.
But then different strains will react differently so would be hard to compare.
Ultimately hard to choose 1 method when you can get experienced grows doing both methods.