My first autoflower grow

I have 4 days ish of pre flowering left. They've grown good in height and buds are starting to appear. I have one that's slow and doesn't really want to grow as much as the others but seems fine. I've upped the calmag .5ml up and A&B are the same. I did do a little of leaf chopping and lowered the light to around 90cm and opened the wings fully for good light spread and penetration. Once height has stopped coming as quick I will start adding vitalink buddy at 1/4 strength to get the potassium up!