I've said it 100's of times, the best upgrade for A500 is A1200.
That's for sure, but nowadays many amigans have many Amiga to play with, and they have the insane idea to expand them with "uselss" hardware (me too).
The fact is that is pretty much like with old historical cars: it's nice to improve a "limited resourced" thing to make it work better, even if not near to today standards (of course you don't have to go deep to keep mental sanity
).
Regarding the A570 and CDTV and the way to provide them a SCSI interface you can check this, by a clever italian guy:
http://xoomer.virgilio.it/fmiapa/cdtvinfopageen.htmlCiao,
OgniX. \8^)
