Hi Bill, as any of the voices on the expansion boards edited or not can be and stored in Tone Memory,they may be able to be used on a KN7 that does not have the boards if stored this way. (can't check at home unless I strip my KN of the boards) but any voices edited on the KN6500 do transfer to the KN7 even although the sound maps of each keyboard are not quite the same. I have all 4 boards fitted and they do offer a very wide pallet of sounds and effects to play with. Also in Europe the boards No 1-2 are selling for around 70 to 150 Euro but the boards 3 and4 fetch a lot more even higher than the original RRP.

Regards to all John