Proposed installation - Looking for feedback

Hello Everyone,

I would like to bounce an installation idea to see if this will work if not move towards returning the flow meter. Unfortunately the backflow valve and the irrigation controls are right next to each other. I have taken a picture of the my proposed modification. The little red box (or somewhere around there) is where the flow meter would live.

Would this be ok? If not, could you help me understand why. This is for my knowledge and understanding. I will be doing the work myself and have found all the materials I need to get the work done.