I think I understand how the BFD levels off frequencies. I have read the whole article at snapbug a couple of times, but I have a couple of questions. 1. Since the filter comes as a slope, what is the best way to calculate where I should have the center of the filter if I have a rolloff? ( I have a BPD 1503 sealed) Anthony can you help me on this one?) 2. Also what is the best way to filter the inductance curve once it has flattened out? One big filter or as many small ones as possible? 3. Is there anyway to calculate these corrections?