Topping NL

Hi guys...I'm going to be growing some northern light in a ten square foot area pretty soon. I was just wondering everyones opinion on if I should top them or not. I plan on putting eight plants in this area. Thank you for any response.

I tried to fim my plants but i topped them by accident. There was two colas of equal size and of equal size to the lower buds. Dont think it made much difference in my case. Also you need to leave time for them to recover after you have made the chop, you may see some black coloured sap coming from the plant to heal its wounds.

Thanks charbud. I figure because they will be so close I will leave them alone, unless nl is a plant that will benefit greatly from topping.