I cut a octogon-ish hole in the upper chassis right above the
CPU of my Cyberstorm PPC card too (where the DF1 Floppy
Drive would normally mount). I then mounted a slot fan over it,
but with the fan exhausting OUT through the DF1 slot.
That way it's pulling the heat out of the case, and from its' biggest
heat generator.
I also added taller rubber feet to the bottom of the
case. I found that the area right around where the
daughterboard slot is gets extremely warm from the
underside. Taller cabinet feet helps that warm air
escape, and pulls the warm underbelly away from my
black desktop (as we all know black asorbs & retains
heat). Since these mods there hasn't been a single heat
related lockup or re-boot, where in the past I get lockups
and re-boots after a lengthy session (1 1/2 hours or so) or on hot Summer days
(30 mins and less).
