Clearance is tight when opening ramboxes. There is rubber to gasket contact, there is no apparent wear or damages though. Installed Jan '20.
When opening the front and rear cover doors there is no contact between them and ramboxes.
When ramboxes and covers are open simultaneously be careful to close ramboxes 1st to avoid contact. If you do close the cover(s) 1st the rambox(es) will get rubbed but they also get bumped away--even then, no apparent damages occur.
The cover is anchored in the middle with 4 bolt downs. It took about 2 hours to install but only because I was unfamiliar with the installation. See pics.
We do frequent cross country travel so I was looking for a strong security box-- this fits the bill.