The package was received today - thanks again! The UPS guys did a number on the packaging, one end of it was already open with the tape having been torn through, but the contents remained intact unless there were more than two easter eggs includedToday is the day!
The Tonneau Cover itself is perfect. It's absolutely solid in structure, fits like a glove, and makes no rattles at speed. It's not the cheapest option out there, but other than the stock powered tonneau cover from Rivian, nothing else matches the build quality and security of this cover.
I've been researching some neodymium magnet options that I might attach to the side pieces somehow so that they all lock in together without using the velcro strap, but I'm not sure there's enough space there to put powerful magnets that can handle the weight and movement. I'll see what I can come up with though and report back here if there's something easily done.
For anyone else still on the fence on a permanent solution, this is it. If you're looking for something temporary while you wait for Rivian's solution, well, maybe go with something cheaper, this thing will honestly outlast the truck.