Bakflip or Undercover Flex attached with bed rails...

I'm having a hard time keeping 2 of my Undercover Flex clamps to stay on.
The clamps in the middle just can't seem to grip that bed rail edge.
I have to pussy foot the cover closed to keep them from falling off.

I'm considering getting a bed rail system for my DC.
I know it won't be of much use with the cover closed.
But my wife likes to buy stuff and I'm needing more tie down options for when the cover is open.

So, to those that are using the bed rail system to secure your covers, how is that working out for you?

 

I have an MX4 attached to my homebuilt rails. Way better solution than the way it was designed. I'm not sure if it will work with OEM rails, but it should.

Check out posts 220 and 222 in this thread for my pics:
https://www.tundras.com/threads/diy-unistrut-bed-rails-cheaper-option-than-oem.1906/page-8

 

Im thinking your setup may work for the Trail Edition trucks with the boxes still installed.
Thanks for the idea!