Post Bakflip mx4 installation

I went out and tightened again and it still
Won’t go flush.
the right side seems to sit a bit lower than the left side. How can I adjust it? The rails have set holes in them

 

Any suggestions for weatherstripping that sticks to spray on liners effectively?

 

I was told to stick it to the cover instead of the bed

 

Did you ever figure this out? Just installed mine and have big gaps on both sides as well. I saw that one member didn’t install the weatherstripping across the front and lets the rubber lay on the bed top? I have the spray in liner so I won’t if the weather stripping is needed?

 

Never figured it out but maybe I need a smaller weather strip then

 

You are aware it a plastic composite bed? You really have bed spray, like Line-X, on the plastic bed? Yes, the weather strip is needed. The rubber lip flap across the front will compress into the weather stripping.