Support Beams?

I may just be paranoid but I don't want the main cola to get too heavy and topple over, could I add wooden sticks to support the main stalk?

Of course you can prop her up anyway that makes you feel safe. I tie mine up all the time. No dif than any other plant

Yes but try not to drive a stick right thru the root system, do it when you re pot and use plastic rod/stick to avoid them rotting in the soil.

yup. agreed with previous posts. im used to using sting to tie them down, to LST them, but closer to flower, my topS get too heavy, and i prop them up with dried out branches from previous grows. amazing how strong they are after drying out, and if your working in the same space as before, they tend to have the right size/shape/height as what you want now. i have a bunch of old branches and i use those all the time