Regarding the aspect ratio, I thought of an easy way to check it. Look at the grill on R2D2 and google images of R2D2. It is supposed to be a bit taller than wide similar to poita's sample frame. So it looks like your version should be stretched vertically a bit.
Here is a comparison with R2 in nearly the same orientation with the one in the middle stretched vertically 106%: http://i57.tinypic.com/2iuouip.png