We had a hail storm and are now replacing those covers... Thank you for the good info; we'll be replacing them with better ones. But the video we watched talked about taking the fan out to re-attach the actuator... And the screws in that are some kind of strange thing -- with torx-type points and 2 Allen-type flat surfaces. 1. Do we need to drop the fan to re-attach the actuator? 2. If we do, what the heck are those screws?