I bought the Revo 6,300 in 2018 so it has the gatekeepers, which I love by the way. Ingenious. As you know better than me, the Fortress bag has loops sewn into the bag to which the gatekeepers (or other hardware) are affixed.
My purpose for doing all of this is to reduce the length and/or number of straps and “clean up” the spaghetti of straps that can take over a backpack. Another solution would be to cut the existing strap so it is only 5″ or 6″, sew the ends, and use the gatekeepers. That would eliminate anywhere from 18″ to 30″ of excess strap. The problem is I don’t have the equipment to sew the strap ends after cutting.
I started this thread thinking if I could find the double-sided bachelor buckle, I could remove the straps attaching lid to the top of the pack and just attach the lid to pack with a bachelor buckle on each end. Rex is probably correct that the bachelor buckles would likely slip off.