Whatever the Minimig is (no I didn't read the whole threads but yes I have a vague idea), I am interested if
1. It can do at least what a basic A500 does (no doubt about that obviously) ;
2. There's no soldering to do ;
3. You can supply it with power and install it in a standard PC case.
If the PCB is plug-and-play - already installed in a case - it is even better.
Edit : Of course please don't sacrifice any working Amiga - or I'm not interested anymore !
Good luck !