Thanks for all the help guys and girls. I've lst'd and got 5 or 6 tops on each plant (oh and they're 5 weeks old and have alternating nodes btw) and it was one of those that I cut off for cloning (i didn't think the bottom branches were big enough to clone) I'm gonna have to have a long think about this coz i've only got a small grow area and I reckon if I wait another 2-3 weeks they're gonna need potting up before i find out what males i can remove and my space won't fit all my plants in if they're in 11 litre pots. (I've got 5 plants in total, one of them i didn't take a clone from as it's not big enough yet and I can only fit 4 11l pots in my space) Also i'm going away in just over 3 weeks for a couple of days so I don't wanna flower in two weeks as they'll be showing sex around the time i'm away. The way I see it i'll either have to kill one before i know the sex so they can fit in the grow room in bigger pots and let them have 3 more weeks veg (which i obviousley don't wanna do incase i get a low % of females), or flower now and have a reduced yield. Any other ideas?

Hope that made sense, i'm just on my way out and typed it pretty quickly.

Thanks all