First Grow - Blackberry Kush

Looks like the growth in height has pretty much stopped and energy is being put into bud production. Added a vertical led flowering light to help penetrate into the more dense sea of green. Question: Should I pull out one of the female Hazy/Skunk/BlkBerry that's flowering now and STS it, then pollinate with this Hazy pollen to make some nice fem seeds? Anyone had luck with STS process?