Took my Pacenti 32h rear wheel out for our group ride this morning, covered about 64 miles, went through several cattleguards, and came down hard at speed towards a couple of dry low-water crossings...came home, rechecked everything - ALL GOOD.
Other than the advice I had been getting from old pal and using Roger Musson book - the other thing I would say is - de-stressing the spokes and doing it often and throughout the whole build has helped set things in place. If anything, I think I over-did it....but like Roger said, de-stressing is something you can't do too much...better to find out that things have shifted during the build rather than during the ride.
As it turned out, he's RIGHT!