I would have continued my expansion of my A4000D but I ended up with a deal on a Blizzard PPC. Since my A1200T is now my main machine my poor A4000D sits in my closet for the time being.
I'd love to get a CSPPC for my A4000D (I even put a mediator in it) but I just don't see it happening. I'll likely at some point sell the A4000 to put money towards either a Natami or some more modern mobo. I'm kinda sick of all the troubles I've had upgrading my A1200.
My A1200 is:
Blizzard PPC upgraded to a 603/68060
196MB RAM
Mediator
Radeon
Subway USB
Indivision AGA 1200
Catweasal PCI
IDEfix
and a few other odds and ends. I am currently dual booting it between OS4 and OS3.9. I don't remember the specs on my A4000D off hand other than it has max ram, a mediator, cd-rom drive and a 68030 (not a 040).