I have fully unpacked the skeleton and it appears that all pieces are of a very solid construction. I've not inventoried all the fasteners, but it's assumed that all required parts are included for the assembly of the pieces.
This doesn't have the metal support for the rear of the radio as the stock skeleton has. This skeleton is sturdy enough, and with the brass threadserts supporting the radio, the rear support probably isn't needed. This also allows for a deeper aftermarket radio install.
Everything that I've read about this piece would seem to indicate that it is quite solid.
The rear radio support is frequently in the way of aftermarket radios. It is obviously useful for factory radios, as part of the mass production process, but persons installing aftermarket radios frequently break out that support for clearance, anyway.
Anyone doing such an install is probably capable of coming up with something to support the bottom/rear of whatever head unit they are installing.
All of that aside... Based upon the threaded inserts (among other things), I can't imagine that this piece
couldn't help but be superior to a factory piece. Nevermind a well-used "nursed along" factory piece.