Well - after closer observation, and getting HMonitor and a few others to compare - the CPU, clocked to 3.8GHZ is now running a consistant 53c at idle in Win2K - and under hard work when running heavy duty simulation games (Flight sim, train sim or GTR) sits at 65/68c.
The drives seem to be ranging between 48c and 55c now. I mucked about with the fan placement, am working on a baffle AND I tried some new thermal compound for the CPU.
I am just thrilled at the reliability running at 3.8GHZ (so far
)
I need to work on getting some more air flowing across the hard drives though.