TF530 - 63030 + RAM Board
Some crazy ideas:
1. Use the original (defunct) IDE connector as a support for the PCB, you could also get a nice and beefy 5v there
2. Remove the 68000 completely and do a zero wire type pcb install, the only problem is that not all software will run on an 68030, but that could probably be fixed in the software itself or with different WHD load settings.
The second option would be nice as imho i'm not totally sure the original CPU isn't causing the problems.
It's a shame i don't have an A600 PCB to operate on, but I don't have a Logic analyzer or the skills do debug it as well.