i'm going to embark on my first wheel building project... i have ordered a truing stand, and i have procured my hubs and rims, and now i need to select spokes. i have 20" wheels, and 36 hole high flange hubs. i'm not sure what lacing pattern to use, but it seems like 3x or 4x are good candidates. i'd prefer to do 4x as it is supposed to be very strong, but being new at this, it may not be the best option. can anyone advise me on spoke length and lacing pattern? thanks!