I believe the correct way to re-veg is to selectively harvest. When you cut off a large cola, the plant responds by speeding up growth to compensate for lost mass. You end up with lots of leafy growth. After you cut a cola you should give your girl a week or so to recover. Then cut the next large cola. Warning is, this will extend flowering a good bit, Then it takes at least 2 months of re-vegging to get a healthy plant again. Even then, there's a good chance that your plant either won't survive or will go hermie.