Are you concerned that the slots or grooves on the rail won't be lined up between the rear of the rail and the front? It's a Picatinny rail, not a weaver rail. They line up. They were designed so that optical sights could be moved from one firearm equipped with a Picatinny rail to another with the same rail. It is irrelevant on a Picatinny rail whether the slots or grooves are interrupted over the loading/ejection area. The slot or groove spacing remains the same. The only difference in mounting rings on the DIP rail and the other Picatinny rail shown in the link in post #74 is if you wanted to mount a ring right over the loading and ejection area.
