I just noticed your rough design lines, and things look pretty close. I would need to study in more detail side-by-side, but my initial suggestions might be, (and this might not be the case due to the angle of the photo):

1) the dash needs a minor adjustment. The angle of the front of the dash is a little more angled than it needs to be, (it needs to be a little more "up and down"). If you make the angle a bit less steep, you'll probably have to move it forward slightly, and adjust the length.
2) the top of the black stripe line might be lowered just a bit, (maybe 1/4"). You can see on Ed's Simla that it doesn't go all the way to the back of the fuselage behind the stab....it disappears into the fuselage side.

Just an initial opinion. You have the model right there. What do you think?

Duane