I’m growing one right now for the first time but it’s not my first photo. Managing height is not really that difficult. I would search HST, topping, LST and mainline variations for starters. You can also start the plants on 12/12 to help manage height which will cause them to flower as soon as they reach sexual maturity, much like an auto. Also check out @kaptain3d
Kaptain3d’s 50 Shades of Green 
(Part 2)
Here are a couple pics of my BB that show how much this strain is prone to stretching in the transition from veg into flower. Hope this helps you, best of luck.
1st pic- the week of the light schedule change to 12/12. Second and Third are from about a week ago before and after trimming away the lower growth.