Don't you typically have to have an engineer sign off on the setup for insurance reasons?
(I know the OP said he wasn't actually flying the boxes, but this is just part of the ongoing subsequent discussion...)
These days, it's a good idea to have the rigging work, both the parts used and the implementation, signed off on. It's not required, but with each and every single facet of life these days, liability is job 1. Stupid things like an electrical fire 4 rooms away (and I mean a toaster overheating and quickly extinguished a few seconds later by a quick-thinking employees) have led to lawsuits on other work and installations having nothing to do with the incident at hand.
In music venues, halls, and theaters, it's usually up to the house to establish who can rig and who can't. Although I hope they exist, I have yet to run into a place (in the southeast US, of course) where local government codes were in place regarding entertainment rigging. I've been in places to fly a PA where the first question to me by the house tech was "Hi, point us to your rigging and we'll get started". Same with electrical tails. And every once in a while, I'd ask about house riggers and electricians and the answer was "do what?".
To the OP, that sounds like a non-standard use of the rigging points and eyebolts, which isn't necessarily a bad thing, but I strongly advise caution in putting it together, for all the usual liability reasons. It sounds innocuous enough, but like I said, these days, everything is under a microscope by lawyers and insurance companies.
