Yes I installed the screen at around 5-6 weeks into flowering and weaved it thru the screen. If I didn't do this then I don't think I would have as many bud sites as I do. Back to what i said, if you are starting from seed and don't know if it's male or female then wait til they show signs of sex to install the screen, but if you are using a feminized seed or a clone and you know it's a female, then I would rather install the screen during veg and pull it thru and under the screen and you will have a bigger yield per plant. The reason that most let their plants get so tall before they install the screen is so that they grow more bud sites, but with me installing the screen during veg and pulling it under. I believe this served the same purpose. I DO NOT weave under and over the screen, but pull the stem out of one hole and under to the next hole, then pull back out and back under the next.