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Not to throw another wrench into things, but I've successfully swapped 800K heads into HD drives on numerous occasions to fix troublesome HD drives. They appear to work fine. Perhaps the heads are different, but are engineered with tolerances that make them compatible. Happy accident if...

What if you did something like this? https://www.tindie.com/products/ttdesign/apple-desktop-bus-adb-optical-mouse-retro-board/

But not the original LaserWriter.

The fact that you're even investigating is good enough for me.

While not Apple, it's really hard to go wrong with a HP LaserJet II/IIIP or 4M (regular IIs & IIIs and 4s can be upgraded to a "Macintosh" edition by adding a PostScript module and JetDirect card with AppleTalk.) I recommend them because not only were they ubiquitous and often used with Macs...

@zigzagjoe What about doubling as a RAM card for a RAM disk? Daystar (and a few other companies) used to make the Daystar RAM PowerCard that offered (I think) 128MBs of RAM disk space. I don't mean to pigeonhole, but I am a pigeon.

@zigzagjoe Could a PDS splitter work in a IIci? Or do you think it's better to just stick with NuBus?

Oh. Hah. Well, that thing is probably rarer than hen's teeth.

Ooooo, neat! What a shame no one used it. That would have been cool. I wonder if a SCSI card could have been made with high speed cache, high speed DMA, and drive access.

I was hoping the advertisement would explain what all those connectors are used for. Smaller one is maybe for additional cache?

They're still popular at banks and other financial institutions. Every LCD I've seen has a privacy filter. Although at my local bank they all face towards a large window next to the drive-up ATM. I looked, and you can see all the screens. Not very well thought out on their part.

Nice fix.

@zigzagjoe Holy cow, that CPU version is cool. Any guesses as to whether it'd work hanging off a Daystar Turbo in a IIci? Or would it only work in a Quadra?

@Snial Could that INIT also allow for virtual memory beyond 8MBs to the maximum of 16MBs? Or would that still require the hardware MMU component?

If it hasn't been recapped yet, I'm surprised you haven't had any additional problems. LCs always need a recap. The most common issue is squealing from the speaker.

Thought I'd mention that Bolle currently has 68040 LC accelerators for sale over here: https://68kmla.org/bb/index.php?threads/fs-25mhz-sonnet-presto-040-lc-lcii-cc-clones.49595/

Could the IIfx version get blinkin' lights instead? :D Or if doesn't already, a HDD led header?

So ... what would happen if you plugged an accelerator into the NuCF while in a IIfx PDS slot? Sparks? Or just crashing cuz of the clock signal?

Those beads are weird. A while back I was recapping a VCR, and all the through-hole caps had little fabric covers on the legs. I don't know what their original purpose was, but they wicked up the leaking electrolytic goo and kept it off the motherboard. So that was an unintended bonus...

Some basic Googling seems to indicate that you can't use virtual memory without an MMU. Probably why even the simplest upgrade was also an accelerator with a 68010 or 68020 so they could add that MMU and utilize the full 16 MBs.