I think I know some potential mistakes:
1. I sized the lab ceiling space to accommodate the largest duct on the entire 2nd floor, but now I think it just had to be the largest duct size in the lab room, since the ceiling heights are different. Is that correct?
2. Some have mentioned non-rated interior partitions must go 6" above the ceiling. Is that true that the vignette is scored that way?
Any other issues?
Many thanks.