Architecture Challenge

This is my almost completed top at the point where I decided to make a big change.  For me the dark part of the loop was not dramatic
enough (even though proportionally it was in keeping with the inspiration photo); and I didn't like the way the edges of the dark loop were stitched and, why, oh why, was I too lazy to change the thread color when I was piecing it!

So I covered it with sheets of tracing paper taped together and sketched out a wider loop ...   

... and then pinned fabric to my sketch to see 
if it was more the way I wanted it to look.

Here is the finished top and if I can drum up more patience (this was more labor intense then I anticipated), I will take out that loop again and make it using made fabric ... so that it would look more like the pinning job above ... and also fix a slightly flat edge in the loop which doesn't please me.  I didn't see these subtleties while I was in the process.  For now I will leave it on my wall and think about how to proceed.  At least the deadline has been extended!