Yep---I added at least a pound to mine---I'm going to add more it looks like....Yes, my C/G is at the rear of the recomended C/G....Mine was so tail heavy it sat on it's tail when I first put it all together. I'm running all large nicads in mine and still had to add weight even though I was carefull about not adding weight to the tail...However, I did static balance the rudder due to all of the rudder flutter problems previously mentioned in other threads...I never opened her up today on the maiden and kept her at 1/2 throttle the entire time as she was a handfull due to pitch sensitivity...

Kevin