This is interesting. A hoop on the front of the tub ahead of the driver to deflect flying debris & tires. (These links only stay alive foe a few days.)
The article contains an interesting tidbit on canopies.
On the back of mixed results for the shields - with the polycarbonate one shattering and the aerospace canopy flexing - the roll hoop tests have been more encouraging.
Too bad, the canopies seemed like they would be the best protection, especially for small parts.
I hope the video works later.
It looks ugly, but it may work. I don't see how it would help with flying smaller parts. It appears to be bolted to the pavement. I wonder how secure it can be made to the tub? I suspect it would still get shredded/removed if someone's topside went into the fence.