Per Char Jackson:
The case that I wanted was the Norco RPC-4224, which now sells for a
whopping $416.99 at Newegg. With that case, though, any drive can be hot
swapped just by yanking it out via the front panel. No need to pull the case
out of the equipment rack or open it up.

It's calling out to me as I write this..... -)

And there's another one with "Only" 20 bays for seventy bucks less....

But now I have to figure out what they mean by "BackPlane" and the
connector situation - i.e. whether-or-not my existing plain-vanilla SATA
cables are going to cut it....

--
Pete Cresswell