I am in a similar situation, cover sitting in the garage, truck at the dealer. Picking it up tonight, I will install it this weekend and will report back.
I am "hopefully " a month out until I receive the truck and bed cover. Will do a video and provide feedback. It is easy to adjust how tight it closes, but if I have to chose between watertight and auto tailgate, it will be water tight. Hopefully I can find the sweet spot. I can see myself...
Yes I do have the power tailgate, but am ok if that feature does not work unless I unlock/open the cover. Having a weathertight cover that is secure is my main objective.
Diamondback Bed Covers are now available for the 2021 F150. I ordered the SE model today. My brother has the HD model, they are well built and he has never had water in the bed of his truck. link attached if you are interested.
Aluminum Locking Tonneau Covers - DiamondBack SE – DiamondBack...
I think there may be some confusion. I have the WeatherTechs on my 2015, and they fit snugly against the under seat storage, which is still baseline on the 2021. I believe WeatherTech is saying those dimensions have not changed for 2021. If you order the Partitioned Lockable Fold-Flat Storage...