Today I decided to take a look at the mod that was posted and see what my unit looked like with the cover off to see if I had the air restriction. I know someone posted on the page that contained the mod that Forest River was investigating, and my unit being built July 11th, I was hoping they had fixed the air restriction problem.
As I got up on a step ladder to remove the cover on the inside, I happened to (for whatever reason) pull a vent over off the nearest vent first. Much to my amazement, there was plenty of air flow, great force, but there was aluminum tape on the inside of the air vent to wrap around the hole in the ceiling and it was either not pressed back down on itself, or had come back so the tape was sticking straight up and down, therefore restricting the majority of airflow. I pressed the tape back down inside the went channel running through the ceiling and was amazed the the air flow after. Another problem I noticed is my front most vent, and rear most vent didn't end at the vent. Instead the channel ran right past the vent and continued on to ? no where? I didn't have any insulation, but I had a couple plain t-shirts which I stuffed up there to block the air from continuing to blow past the vents to no where.
So far I am amazed at the difference. I ended up not even pulling the inside ac down, but will be keeping an eye on the cooling to see if we're good from here or not.