Trying to search for answer but haven't found it yet. I have a piece of aluminum tubing with etrack fittings on either end. Will this fit onto boxlink brackets or do you have any suggestions how to use the etrack fittings on the boxlink brackets or cleat assemblies? Thanks,

 

Yes, the boxlink plates will accept etrack. You have to remove the cleat. I don't really know how the tubing is oriented, but if you are talking about running it perpendicular to the length of the bed and going from etrack-to-etrack, that would never work as you would not be able to fit it in. The tubing would have to telescope.

Most people I see use the etrack style brackets with the o-ring.