I'm doing an auto flower, its not lr2. Mine is sour bubbleryder. They are not all the same height and yes I am lst on a few, not so much because of height, but to help fill out the space.
remember tho that with photo period strains they can be left to vegg longer and recover from stress if that is done or done to many times. im sure some tying down would be fine but i wouldnt top or fim, or aleast not anymore than once
I wld be careful doing anything that cause a lot of stress....topping an auto is insane...I wld never do that... some light lst if really needed...you just don't want to do anything that might slow growth down...if you do it will hurt yield...it's not like you can just veg longer to get back on track...with autos you are on their clock...