RE: CMPro Extra 330L 50 size
I really hope that you mean 96mm not 96cm. This in itself would be a HUGE problem, but seems very unlikely as 96cm = about 37 inches. I have yet to fly mine due to the horrible weather, so I cant yet say. Racingnismo says he had his set at 95mm and it flew fine (and looks like it lands fine in the video's). I had read a post where a guy put his CG at 96mm back from the wing TIP. This is NOT right. You need to make sure that you are setting the CG next to the fuse. If you have done this and its still flying tail heavy, you may want to find a way to add a little more weight to the nose of your plane. I didn't realize that you had your CG set at 80mm at one point in time. This would make a HUGE difference on how the plane would handle then and now. It would make it much more snappy moving the CG from 80mm to 96mm and make it "seem" tail heavy. I hope this helps. I am sure Racingnismo will chime in soon to give his input. It will be more valuable due to him actually flying this bird.
EDIT: Told you Racingnismo would chime in, and he did it before I was done typing!!
Kevin