Thanks for dropping those references, Glen! I think I misworded my post a bit—I was actually wondering about the internal strapping that’s hidden from view. For instance, how (if at all) is the underlap held in place (outside of the visible velcro)? I recall seeing some internal rigging in early Rogue One BTS photos that kept it closed, alongside the thigh-to-abdomen straps you mentioned. I fully intend to go with the fabric covers over the nylon strapping (with buckles) as per the references available!
As far as the rear cover strips go...
They're definitely angled outward toward the top, and the bottom lines up with the outer corner of the bottom rim, exactly as you pointed out. Honestly, that visible underlap might just be a dressing issue, similar to what we noticed in a bunch of the Celebration photos. It’s always tough to prove these things with just screenshots, but I think this alignment is on the right track!
Working on test prints now, will update this photo with additional photos in the next day or so.
EDIT:
As promised, test prints! Planning to make a few minor tweaks to the bottom rim to give it a tad more clearance, buttttt I'd say I nailed the thighs.