Rattles

On Friday, I came into the office (company holiday) to make some modifications to my office in hopes of stopping all the annoying rattling in my ceiling. I popped out the HVAC return register and lined the ceiling grid with felt... then put it back in. It stopped those rattles.

Problem is, now the supply register is rattling. I may have to do the same with it. Hopefully, once I do that it won't extend the problem to the light fixtures -- but it might. My office is cursed.