I used some coroplast to make an 'A' Frame that sits in the discharge plenum of my roof AC
Top of 'A' splits the Fan room air wheel so air flows directly down each side of 'A' and is forced out the duct work
Did that back in 2008....forgot I did that MOD...or HACK in todays vernacular until I read your post
Did increase airflow thru the ducts and somewhat quieter
Is it time for YOUR Medication or Mine?
Dodge 3500 w/Tractor Motor & NUWA 5vr
US NAVY---USS Decatur DDG-31