good tip i got and haven't heard it reiterated here is to apply plenty of lube, (tri-flow, etc.) to eyelets and nipple during truing/tensioning. the less friction the better and you get more actual nipple turn instead of spoke torsion.

My experience with the DT is spoke lengths coming out 1-2mm long, then running out of threads for adequate tension. I've been knocking 1-2mm off DT calc'd spoke lengths for my builds. Total of 4 wheels built now which isn't a huge database of info, just my experience.