I am trying to build a 4312C crossover (3112D) and I don't what gauge wire to get for the .2mh air core. I have searched the site and could not find any info on this other then use the DCR. The problem with that is the driver (035tia) states the DCR is between 3.5-4.2, when I check Madison and Parts Express, they are no where near that. Is there some math that I am missing or? First post because the search works really well!