I guess I gotta get some way to get more software onto one of these. Looks like it's either jrIDE or a Gotek with HxC firmware...but, since these don't have memory expansion already, it's probably worth going with a more expensive jrIDE for the 1MB memory.
And, since the disk drives actually work, I kinda hate to swap them for a Gotek. I have Racore expansion boxes for a second disk drive slot, but they're all incomplete, missing parts I can't even identify or find references for.