Hello, i am curious anyone has experience on topband with the new roofing filter from Inrad for the FT1000(D) series. I decided to upgrade my old FT1000 (see also the w8ji site) and keep it for more years. Also i am not using the Ft1000 250 hz filters because of to much signal loss.. Change into 400hz filters worthwhile ? Greetings, Bert PA7MM