I now have two 7K�s and a KN2600. I think they will outlast me.
Elizabeth, I load a new setup for every song. Most of my setups are available to me via the Favorite Songs menu. If I don�t have it there, I load by number for the SD memory location. I have the SD memory location noted on each song sheet. It takes less than 5 seconds to load a completely new setup for each song. I normally only use panel memory Bank A but sometimes use more panel memories than 8 and spill over into bank B. Don�t recall ever needing more than 16 panel memory setups for a song. As I play the song, I use foot pedals to move from panel memory to panel memory, almost always moving up to the next memory location. What this all means is that I almost never press any of the panel memory or bank buttons when I am playing. I do it all with foot switches. I do use the buttons when I am creating a song setup.
This also means that I don�t need or use Custom Memory for song setups and really don�t need more than banks A, B, and C of the panel memories.