no i would FIM caefully, that is actually a sativa trait i can show you later i will throw a pic up of some mexican sativas, i had one of them i Fimmed and one i did not side by side for the exact same reason your asking yourself right now, because both had that center structure the one i fimmed grew like i wanted, the one i did not sat for a few days looking like yours, then took off at the top.