if you can put this on Macintosh Repository or Macintosh Garden, I might be able to transfer the extension to my LC III from an iBook G3 and test using a CyberDrv 120S SCSI CD drive, hopefully, this driver will allow me to use the Apple CD player app with my non-Apple drive
chances are, either your hard drive's dying or the OS is corrupt, try running Disk First Aid from floppy disk, or CD if you have a compatible SCSI CD drive
it would probably be the same as plugging a Famicom into 120V instead of 100V, it would work, and the voltage would be slightly higher, but hopefully not enough to overload (take this with a grain of salt, I don't know a lot about high voltage so)
I might get this board for my Classic, it would be nice to not have to swap my Classic board for a Classic II board to get an 030 (I know it's 16-bit but still)
No. On the Macintosh Classic, the only way of adding memory is with a card that either has memory slots or has memory built-in or both. I found a Kingston RAM card in my Macintosh Classic that had 1MB of RAM onboard and 2MB on SIMMs, adding up to 4MB total, including the 1MB onboard
the iisi uses some of the onboard ram as video memory, so it is crucial that there is memory in the slots so it can operate with a usable amount of memory
depending on where you live, @Mac84 or @Branchus might be able to help you recap it, and even @AmigaOfRochester (I cannot recommend this guy enough, he saved my LC III when I botched a recap) could
you can also replace the G3 processor with a G4, though it is a very involved process. Dosdude1 actually made a video a few years ago about doing the same to a Powerbook G3