Vent Lids

As I recall, you need to unscrew and remove crank and screen inside, remove lid and disconnect linkage from the outside, install new lid and connect linkage from outside and reinstall screen and crank from the inside. Best to have a helper on roof to remove/disconnect linkage and you inside to install screen and crank. Installation of Maxx Air covers is fairly simple from the roof but I forget details. Polycarbonate lids come in white or amber color.