I feel you. At my church I play the organ and keyboard, and the other guy plays the organ and bass. The only difference is, he on't practice, and he tries to come in and change the music at the last minute, on sat., or wants to come in sunday and go over the music, which I ain't wit! But thenhe wants to jump on the organ, and because he don't know the music, he fumble over it. But he has been there longer than me, so I have to respect the position, so alot of times, when I get on the organ, and he wants to play, I tell him no rehersals, no playing.