That's a damn nice case. 😀
When you come around to use the 3V i486DX4 maybe rotate the CPU heatsink 90° so it blows air over the VRM.

I really like the style of the case, but it feels a little flimsy in terms of the construction. There's a lot of flex when it is being moved around, especially now that it's loaded down with drives. The caddy is only held in place by the three pictured screws as well, so if I have the tower on its side to tinker with things, it sags quite a bit.

I somehow didn't have the correct cables/connectors to wire up the LED display earlier, so hopefully I'll get that set up tonight, as well as running some benchmarks so I can show off, haha.

Was extremely busy when I got home, but I was determined to get the LED display set up and run a benchmark last night, so these photos were all taken at about 3am this morning, right before I went to bed/woke up for work, haha.

First power on after hooking up the LED display. I guess this case was manufactured on top of an Indian burial ground or something.
TOPBench results! ~197, so right at the level of a Cyrix DX2 clone. Who could have guessed, haha. No photo but it scored 57 when de-turbo'd, which came back as comparable to a Cyrix DX2-80 downclocked to 25Mhz.
LED configured! According to CHKCPU, the turbo button in this build drops the clock speed from 66MHz to...64MHz. I suppose this mobo has it set to disable cache as well considering how even the least resource intensive tasks and games run like molasses when it is pressed. Anyway, it seemed disingenuous to configure the LED to display the standard 66/33 readout, and setting it to 66/64 seemed really dumb, so I just configured it to show the TOPBench scores instead.

While I was doing all this, I started having issues during POST with my memory and hard disk randomly failing tests. I could continue boot anyway and run memtest86 and everything would come back okay for the memory test failures, but I swapped both sticks anyway for different ones out of the same set, and that seems to have stopped it failing the POST check. In the event of the hard disk failures, if I rebooted it would be fine and would boot, and there have been no problems accessing C: nor any weird noises, but I'm probably gonna go ahead and replace the HDD soon anyway. While I was replacing the DRAM, I realized I set the jumpers incorrectly for the L2 cache (was only using one bank) so I fixed that too.

Next up on the list is configuring peripherals, installing some QoL utilities, and I've decided to go ahead and add network support as well. Unfortunately that will all have to wait for a little while, until I finish winterizing my office and moving in my new old desk - the lady has kicked me out of my base of operations in the kitchen and the office floor is very cold and uncomfortable nowadays, haha.