Hey Chris, that's a nice idea... bringing in a dio that you built to your job for display.
As far as homeowners/renters insurance, well don't try to get the model
& dio covered. You mention that you were a mechanic, instead you
brought some tools to work.
I would also discuss your concerns with the manager or better yet, the
owner if he's around. You could have them display it in a safe manner
and with luck, cover it under their policy as they would any mechanics
tools in the shop.
Good luck