How would I prevent that? I've researched low stress training but I'm confused as to how I would bend that "main limb" or if I even should.
That or try putting it in flower at a shorter height. As for bending the main stock. The top 4-7" of the plant is more flexible then below that point. Take a stick and put on one side of the plant. Run string off the stick. Tie to the stalk right below the flexible part. You can tell by touch if it'll bend and what point the stalk gets tough. The stick has to be stout and anchored. You might want to run it off the wall.
Opposite side. Take a twist tie. Make a loop around the stem about 2" from the tip top. String to the loop. Straight down to the pot.
Pull the string gently down till you get about a 45° angle in the stem. Pulling against the opposite string anchor. Next day you can pull it close to 90°. Doing that alone will save about 4" in height. If she keeps stretching. Tie down the new growth. Rinse, repeat.