Tailgate closes but I'm not sure if it's a permanent fix or if it will need constant adjustment? Also, the cover will not latch if the tailgate is up. And after looking at the situation closer, part if the issue points to a bed not being square, another problem is the bed rails are flimsy the closer you get to the tailgate.
Here's where I screwed up originally after reading this page in the instructions. The rails on the truck are straight up and down which contradicts what this paper says. I removed the sticky backed strips so the tracks would sit flush against the rails.
After assembling it, the tracks were too far apart. I removed them and reapplied the sticky backed strips so that they would be parallel with the bed rails(vertically) after installation. It's hard to understand this without having the instructional page in front of you and seeing how the strips originally came on the rails.
Here's the drivers side track installed.
Here's the passengers side.
That was installed the way the instructions said. Both sides were hitting the tailgate, the cover wasn't latched(it's a little heavy and has an impact on how the tracks sit).
I just raised up the drivers side slightly so it would clear the tailgate, and retightened the rear clamp.
After several tries to adjust the passengers side, I put a 1/8" thick aluminum shim between the rail and the track where the middle clamp is. The rear clamp has 1/4" of shims installed so that when the clamp is tightened it angles the track up.
So now the tailgate closes with the cover latched, but the passengers side still slightly rubs the plastic tailgate cover.
Here's the latches, both sides engage approximately the same amount.
Here's how the instructions say they are suppose to be. Mine are like what's shown in the circle/slash.
Lastly, will the cover allow water in? Yes but it's not BAK's fault. You can get an aftermarket tailgate seal to close up most of the gap at the tailgate. The rest of the cover appears to offer good moisture protection. Here's a pic with a flashlight in the bed and everything closed.