Hi there.
As a grower with 2 similar sized tents, in my experience a little LST and a scrog net would be more than adequate to create an even canopy. I grow several plants at once comprising of several different strains and without a net to tame the wild ones it would be difficult to manage them equally. Unless you particulary want to gain some experience with mainling I would employ a scrog before the stretch begins to ensure that all bud sites are receiving the same light intensity (PPFD and DLI) during flowering stage. Once you are happy with this technique then perhaps on your next grow consider mainlining. Although LST and a scrog should cover pretty much any scenario in a small tent, it is good to gain practical experience through different techniques. If you fix the net at preflower stage it will serve you better than waiting till the stretch and then trying to fold and bend unruly stems that may snap under too much pressure. I have learned this too my cost. Gentle handling and a little preparation are key. I wish you a trouble free grow dude and when in doubt ask, there is a lot of very good advice here to those willing to learn. I find a mosey through some of the historically solved questions is very educational too. 😃