2 in 1 fan duct with seperate lower nozzle

Acknowledgment for rvjm21 and Ug1y for giving me an advanced starting point on this as I had started from scratch when I realized I didn't need to start from first principles and could build on these.
I found the original worked well but the lower duct was too close to the bed and knocked the model plus it would allow correct first layer clearance.
When I saw the modified version I thought it would be just the the job. I saw things I wanted to change though. Such as the opening at the bo