Now, what makes you think that??? What about those firmware provisions for OPT2, OPT3 and OPT4 filters that have been so carefully retained from one version of the firmware to the next?? Ron AC7AC K2 # 1289 -----Original Message----- Now that the K2 box has pretty well reached the end of its development (?)... Mike VP8NO (IOTA SA-002) GQRP 10148 K2/100 #1400