I just got the plans for these and I’m ordering the parts but I have no idea how to assemble a crossover and it seems there isn’t a board in the plans. Won’t I need a circuit board to attach everything to? Do you have details on assembly and where to get a board and what board to get? I saw an earlier post where you said to dm you, but I don’t see anywhere ti dm so I guess I don’t know how to do that either