LST in flower.

Hi, Iv LST my plants 5 Gelato 41s in 20l pots.

I flipped to flower two weeks ago, can i still train them in flower? I had an even canopy up until I flipped to flower and now some are growing higher than others but I'm worried about damaging them messing around.
I'm only on my 2nd propper grow so still new to everything so I apologise if this is an obvious answer, I did search but couldn't find much info.
Thanks
 

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