Hi growmie!
I would recommend you to keep the main stem straight when mainlining, create a T shape.
On your next transplant: burrow your stem deeper into the ground, keeping it 1 inch above the soil level is more than enough.
Reason for this: more stability and the plant will be more capeable of holding all the mass of the 8 colas, when its bend like yours is now, it will most likely snap due to its own weight, especially when you grow some massive buddz😁👍
Happy growing amigo😁👊