Bought a new case for my 233MMX project. I'll be using its current case for something else because it has some sentimental value to me, but it just didn't turn out to be the fit I needed for this build.
My purchase was an AOpen H700A. It may not be 100% time period correct, but it was new old stock and will do exactly as I need. Seems to be from around 2002, so not too terrible. Seller pics attached.

The reason from changing from my current case is quite simple - this case has the four additional hard drive bays above the PSU, which is exactly what I needed for the build having a total of six HDDs.
It will still require some minor modifications to make it how I want it and to remove some of the "new" factor from it. Plans include swapping out the clippable 5.25" covers with regular ones from that big box of covers I found awhile back. Replacing the front USB area with some smoked acrylic and a MHz display which I have laying around and chopping up some of my blank ATX IO covers to support AT keyboard and have holes for Serial and Parallel ports.
Having a brand new PSU in there is a bonus too, but I'll find another home for that.
Also having so many 80mm fan locations will keep everything nice and cool - and a cool system is a happy and long lasting system! Looking at an archive of the AOpen site seems to indicate around seven fan slots. Absolutely wonderful.
Looking forward to it. 😀