Hello, I have in my K3, in both MAIN and SUB this filters: KFL3A-400 400 Hz, narrow 8-pole filter KFL3A-1.8K 1.8 kHz, 8-pole filter When I reduce “width”, I notice that it went down to 200 in CW. This is true? So that´s means I don´t need the KFL3A-250 250 Hz, narrow 8-pole filter to narrow less than 400Hz? 73, Jorge CX6VM/CW5W K3 #4077