Hey MMX,Another piece of the bed cover puzzle...
I built the bed cover with this box in mind, even though I didn't have it at the time. Fortunately the measurements Summit provided were dead on. Going to get some black egg crate foam to put inside, to keep the tools and such from flying around. Have it set up like a gun case.
Did you get a new truck? I can see the rear 1/4 panel and rim in your last picture. Of course it's red. LOL.