Oh wow I was literally using one about an hour ago. Mines installed in a Quadra 800. My hints are:
- Systems above 7.1 don't require the enabler
- You must physically turn off the computer and on again after enabling the card in the control panel
- Double chiming is normal
- I use 72mb RAM with Mac OS 8.1 being 'the best' I've ever used on this machine
- Your Macintosh will identity as a Power Macintosh when the card is used.