I have been aggressively LST training throughout V...

You can train them how ever long you want that's truly up to you , the question is what are you trying to achieve . If your doing it to get an even canopy then I would continue to do so until your satisfied that the canopy is even then just let them grow . With the Scrog in place you will be able to notice almost immediately whats going to stretch and what isn't going to as bad . Like I've said you can LST all the way through but most people do it to get an even canopy or open up bud sites to the light. If they continue to stretch a lot you can place a second scrog above the first to further help control the stretch . I hope this information has helped you a bit ! -Happy Growing!