Hi Jamie,
My Greenley came out at 7.5kg with a Zenoah 38 engine and 500grms of lead up front. I've just put a Zenoah 45 on it so i hoping to remove some of the lead when i rebalance the model. like John says they fly very well, one of my flying mates has built one and his came out at 9Kg!!, still flys well.
Sean.