I worked that out based on our discussions here - very high smoothing for most surfaces, with low or no smoothing for the trenches.
It's a very efficient way of doing things, but frankly requires more detailed planning in the modeling process than I'm used to. Now that I know it, I have managed to put it to work on some of the new detailing for Saladin
After converting it I'm surfacing and reassembling the model a few parts at a time. So there are many missing parts right now.
I'm working on getting a little "plasma" thing going for the drive spheres.