I don't even put the frame over un till i start to flower then i just keep tucking the tops under for about the first 4 week of flowering after that just let them do there own thing,the reason i do this way is if you put a table/netting over them during veg you end up haveing to double net,by getting the tops tucked under the netting during first few weeks of flowering,eg the stretching time you will end up with multipul tops,but i do most of my work during veg with out any netting just multipul topping,i top around 5/6 times every single branch its the only way in my opinion to get at min 12/13 oz but done right will will get a lb per plant or near about that weight.if you do one plant per light some times less is more,its the major mistake i see new