Took off the top clamshell-style lid and replaced it with a simple nylon extension collar and cord compression system. Ditched original 1-1/2" webbing/buckles for cords and cord-locks. Replaced original heavy poly collar with lightweight coated Wallyworld nylon. Uses two cord-locks to secure two cords arcing over the top of the pack, starting near the pack's haul loop. These cords originate, however, from their respective sewn-in positions on the body of the pack. Perhaps the following pictures show what I'm trying to explain:
Showing the "pivot point" fixed loops for the long cords:
New extension collar:
The attachment points for the cords, as is, create a sort-of compression effect as the cord-locks are drawn up, but they also have a tendency to "pull" or pinch the front and back of the pack together, which just makes it carry weird sometimes. So I'm thinking of just cutting the cords out and attaching them to the loops with a knot. For now though, I like them where they are.
Removed approx. 4oz from the pack's weight, and it clocks in at 1lb. 3oz. now. I've carried 25lbs in it with an additional 3/8" torso foamy rolled up for structure. The back panel is thick enough for underfoot duty once its bedtime. The hip-belt pockets hold a days worth of bars and a headlamp.
Overall, I think these mods made a decent pack much more versatile. I can use the Raid Revo for maybe 70% of my trips now. Even so, I think it'll last me quite while, but I look forward to wearing it out...