Be careful copping changes from the piano and guitar charts. I got fired from a boat gig out of Miami when the singer we were backing that week saw me and said there was no way she was gonna have me "faking" her set. She wouldn't even let me finish the rehearsal.
Now that I think back I probably got fired more for telling her her charts were barely legible and what you could read was full of mistakes............and that she had a tin ear and a fat ass. Boy she sure didn't like hearing me criticize her charts....