Thanks for the great advice everybody. :-)
I am indeed running a IIe- Platinum, which I think is the last version
made, so hopefully it has the highest rom version.
I do have the 64K/80 Col card in the aux slot. I have a Kensington
system saver running, so hopefully it's fan will help with the heat (I
had one on my original system also, though in it's last years, it's fan
was running slower and slower- the one I have now zips right along).
I will try the configuration suggested- flash boot in slot 7, leave
5.25" in slot 6, 3.5" in slot 5, clock in slot 4. I have a serial card
in slot 2.
I have a slinky ram card but think I will leave it out for now anyway.
Do the drive interface cards draw much power when they are not being
used?