Hi Pobs,
The 1.28c patch works great with my 3dfx cards running in SLI. I am able to run the game at 1024x768 res with no issues at all. The frame rate is quite good with a limited number of planes in the air (30 fps) but drops down to the low teens when there are many bombers in the sky. This is to be expected on such an old PC. Overall I'm happy with the performance.
I have a third PC which I might setup for use with EAW as it has better (more modern) components and should work fine with 1.28e. I'm having fun experimenting.
Thanks to all for your assistance!
Jiver67