Paul,

Once a year, sometimes more, I put together a party for some old friends, many of which who play guitars. We were all part of a 5-piece country band at one time, long before keyboards were a hot item.

When I switched to playing keyboard I discovered something I was never aware of - perfectly regimented tempos were something our lead guitar player could not cope with. Apparently, the only person he heard while playing was himself. You may want to spend a little time brushing up on some tunes to determine if he can follow the keyboard's strict tempo. If he's accustomed to playing with a drum machine or a keyboard player, and the keyboard provides the drums, then there shouldn't be a problem.

Good luck and I hope all goes well for you,

Gary