John in MA
Respect the gamba tuba
Was that tab broken because the weight of all the gear from the top plus the other shelves came smashing down on it?
I don't know for sure, but I think the right tab broke first, then the amp dropped down, everything else crashed down, and broke the left tab.
So, it appears the shelves just slide into the tabs from the front of the rack, correct? If Bell'O would have engineered some sort of retention mechanism to keep the shelves from sliding out from the back support after installation your accident never would have happened. That is a design flaw on their part, IMO.
The shelves slide into the tabs and these soft plastic screws clamp (poorly) down on the glass. If a shelf is pulled out, it'll fall down. If the side rails are pushed apart, a shelf will fall down. If a clip breaks, a shelf will fall down.
I'm not happy with the design in the slightest.

