No problem, I'll take care of putting the thread back on track later.
I've used a 4 GB CF, which was more than enough - the d8b uses FAT16 which allows for a maximum partition size of 2 GB. But you can buy up to 32 GB CF cards quite easily these days (for the Alesis HD24 or Mackie recorder it would make sense) - you might want to watch out for UDMA compatibility.
The adapter I've used is something alike those on
ebay, again, it might be wothwhile to look for UDMA compatibility even though I'd not pay extra, as it must be a non-issue with modern adapters. It is practically a wire-through connector adapter, no logic involved. There is a floppy drive style power connector on the back of these boards, that's how you power them. You might need to acquire an old style HDD to 3.5" floppy power cable adaptor inside your caddy to make it work, or you can cut and solder wires if installing permanently.
Formatting and everything works just as a regular HDD - however, I had issues and could never get it to work on an old Digital (you can guess the age from the name) laptop. I'd suggest to buy a cheapish (but rather good quality, DMA/UDMA compatible), small capacity CF card and the adaptor - for a ~$20 investment you can give it a go and see how it would work in your d8b or HD24. If that works, you might want to try not explicitly DMA compatible cards to stay on the cheap side when going larger capacities. Maybe it'll work, it does work in my PII Toshiba laptop quite satisfactorily with a low end Kingston 4 GB card.