Wow, we're practically neighbors. Second floor game room that's kind of open? Mine is a living room that's open to a dining area and the entryway. FAR from ideal. I should have been happy with what I built last year, but I like to tinker.
I got the flex duct replaced and moved out of the way. It was HOT up there even with the mild temp today and rain. I really should only be working on this in the mornings.