auto grow

Greeting fellow farmers... I am growing two autos a blue dream and a zkittle. presently both are in a 31x31x63 inch tent under a 135w led light. I plan on separating them leaving one in the present tent and placing the other in a 36x36x80 inch tent. My question: Should I do lst training bending and tying down to prevent them from growing to tall but possibly increasing the yield for the tent or should I just leave them alone and let them do what they do?

Totally up to you, with Autos I wouldn't mess with them much and once you're done with them get some Photoperiod seeds you can clone then look into Mainline Training and topping. Clones are not only faster than autos but they are replicable unlike autoflower seeds. Enjoy the grow!

Both.
Do what you want.
Don't listen to people who don't grow autos.