Scrog Question ... Need Advice please

Im currently on my first Scrog grow, and have a few questions.

Do i trim all the fan leaves above the screen ??

When do i cut off the lower bud sites that will not reach the top??

Really ... Any Advice or Tips/Hints would be great , Thanks everyone

Dont cut the fan leaves above the screen.. Bud needs its light.. You have up to the second week of flower to cut the lower buds.. Otherwise you risk stunting your final weight.