Priorities are in order when being anal. Before becoming anal over lacing, you should be anal over getting the spoke length correct for the rim and hub your using. I believe the best way to do that is an anal do-it-yourself measuring of the pertinent hub and rim. Then anally repeat the exercise and check the results in several spoke calculators including comparing your hub and rim measurements with multiple databases. Once you believe your chosen spoke length is appropriate proceed to the next most appropriate anal focus.