There’s a ball at each one of my nodes. I heard that when you bend your stems it’ll create a ball from repairing itself but I have had one grow before and it never had any sites like these.
Those aren’t balls. That just where the branches are toughing up to hold the buds at the end. You want them. They look fantastic get a close up picture of a bud if you can
Those are good, strong knuckles. Doesn’t necessarily require damaging/bending to create them. Genetics can cause them too.