Hi fella, what a question to open a can of worms!!! To top an auto!!! Your going to get a 50/50 answer across the board, some growers say no some say yes, to me it all depends on the strain and your level of experience with that particular strain, example would I top a Seedstockers BCN critical auto - absolutely, I have enough knowledge of this strain and confident it will pull through and produce, the thing you have to remember with autos there is no room for error, if your not confident in the strain then best let it run, if it's a strain you have 'put through the mill' previously then crack on, all about knowledge, confidence, best practices, it all comes in to play when growing if your sceptical and not really sure but want to expand your knowledge then try one topped and one not see what result you get, happy growing 👍