I don't want to completely hijack this thread with a discussion on alternating nodes, but just to put a button on my thoughts, here is the 9th node of the Trainwreck I grew this past spring/summer. They're already starting to stagger:i'm wondering if they were there and i just never noticed. all my outdoor grew in the classic pine tree shape right till we chopped. everything always looked symmetrical to me.
thinking about it now we probably did get enough nodes on the big indoor med grows, but again anything we did not top was a christmas tree shape.
Here's one I topped above the 9th that was still symmetrical: