I'm also up for getting these Scuzzweeno™ boards. I have a bluepill that I tried out for something, so it's good to see such an inexpensive and common module being used for SCSI. Like @Huxley said, the SCSI2SD is kind of worrisome to use and having an alternative would be great. It would be nice if we could re-flash it in case of a firmware update. It seems most projects like this end up having many updates.
FWIW, I know you said you checked your ethernet cable and are sure it works, BUT IIRC, very old ethernet was fussy...really fussy...and sometimes would only work with a "crossover" cable. Auto-switching wasn't a thing at the very beginning, and we had to buy specific crossover cables for the few Macs we weren't plugging into outlets wired to the hub or plugging directly into our patch panel. If you are plugging directly from your Mac into your ethernet device, this could be the issue.
I'm late to this party, but can't move on before adding myself to the list of people eagerly lining up to buy a few of these when they're ready! I've successfully deployed close to half-a-dozen SCSI2SD's now (both internal and external, installed in various Macs and two Amigas), but they're pretty wonky to configure and I'm always worried that I'm one small tweak away from ruining a working configuration. Given that I now own two NeXT machines which will need solid state storage sooner or later, not to mention an SGI, an HP/UX workstation, various other non-upgraded Macs, etc., I'm very excited to learn about this project
Ups new in this forum ... can someone tell me the capacity etc. values for this RIFA guy ? It's from a Mac II Astec PSU and I want to replace it ...
I couldn't find any PSU schematics or infos up to know.