I've been following the recent threads on available K2 mods - if memory serves, I thought the parts for the 2nd filter SSB mod was included with the KPA100. I sure remember doing this one - and it works great ! It looks like the only mod I don't have of the list on the Elecraft site is the newest one - PLL/BFO mod. Is this not correct. I'm gathering up my Christmas list, so I have to be sure !! Jamie WB4YDL