Anyway, in response to what to do to get back to the great country sound, you might consider getting rid of the new kb and going back to what works for you. Or, maybe just fix those guitars!
I confused about this statement .....
Ketron sounds are some of the best out there..
Yamaha might have a slight edge due to the effects
they use on their guitars like the Eg: slide guitar, etc,..
but that's it.... Ketron certainly is in the top also.