Wow man your plants look so much healthier, good job. They looked half dead.

If you want to LST those plants better get going that main stem is looking a bit thick and may snap when you try bending it over. If it does snap wrap the break with sterile gauze and then again with some tape. Wait a week or two and the stem should have healed.

As far as the branching goes I am aware of two schools of thought here. Personally I do not top or remove branching. I train lower branches to grow mostly straight outward from the main stem. This creates that christmas tree effect.

I have heard of people that like to remove all lower growth concentrating all the plants energy on the main cola. I have never tried this method. Keep in mind the flower stretch where the plants usually double in size when flowered.

Any idea the genetics on those babies?