Alright, I don't want to do this but someone has to...
Great job on the initiative and design, however it seems like you might have rushed through the cutting process. It seems in the photograph that some of the lines are a little jagged, or that could just be because the paint flaked off in certain regions giving it that impression. Either way, as of right now it seems a little half finished to me.
The bottom of the curve (one near the seat) seems like it points a bit too much inward and away from the outer line of the tail, giving it a slightly unnatural feel and breaking the line of the tail.
Please understand that I'm not trying to be a dick, just offering an honest opinion in response to what I'm seeing. I don't have the balls to cut into any part of my bike because I know that I lack the skill. You on the other hand took a risk and it came out pretty good. I'd say if you had another run at it you would definitely be able to improve on what's done before and make it so much cleaner.