Hardyboy.. you STILL didn't explain what LST meant lol =\

That means you need to flower when 8 Inches tall.

Thats it and thats all you have....simple math.

If you top her, you are not going to get anymore height out of her. You will get 2 main kolas but still no more height.

The main kola is only going to account for a portion of your overall yield.
so that would mean that we can top the plant at 16" and not wory about doubling?? which would give a better yield? topping it at 16? or flowering at 8?