> Can I use all 5 available roofing filter slots and also have the > KBPF3 General Coverage Rx filter module installed without losing > any of the slots for the roofing filters? Yes. The KBPF3 is an array of pre-mixer bandpass filters rather than a post-mixer roofing filter, so it does not count as one of the five crystal roofing filters. 73, Lyle KK7P