Just to clarify what your looking at, the white rails on the top and bottom of the motherboard plates are a very hard plastic to support the steel. They are fastened directly to the rack so they don't move. One thing of concern is you may notice the top of the rack bowing down a bit. It's still very strong even though it's drooping down, but for stainless steel the other six motherboard plates will push the top of the rack where it belongs.
That being said we are looking into the possiblity of using aluminum for the square part of the cabinet and keeping the motherboard plates stainless steel. It will be cheeper, lighter and stronger so the top doesn't bow. We'll see when the number come out on the next report.
You may not see it, but if you look close you'll see a stainless steel plate behind the motherboard. It's not fixed to the motherboard yet, but it's there so you get the idea on how the board is going to be mounted in the rack. In picture **361 imagine the stainless steel extending all the way to the front of the cabinet. That is where you will mount any available hard drive and floppy flush to the steel.
The white stuff you see on the side of the case is just plastic covering to protect the stainless steel from getting scratched. That can come off after everything is assembled.
Two addtions to the rack will be mounting holes in each corner of the top part of the cabinet so you can bolt cabinets together, and stop tabs on the motherboard plates so they don't go back too far and end up cutting off your power supply cables. :Q I suppose if you wanted to get fancy, one could even put threaded holes in the tabs and use thumb screws to lock down the plates from moving.
Any comments from anyone since the pics are now displayed? (Thanks jliechty for yours... )
Is it like the "Bottle of wine" that aged with time?
--LANMAN