Love the concept and the composition - it's great
I think thought that some of the lines aren't quite horizontal and vertical. I think a slight clockwise rotation to get the top line horizontal would help (unless it is horizontal and I just need to put my glasses on ) Not sure whether there might be some lens distortion as well with not all the lines appearing parallel?
This made me laugh Mark, thank you!
I never look at the horizontals to make photos plumb, only the verticals, but I'm sure you know that already.
Thanks for posting.