To keep it to a 2-zone AGR trip I have to change from the CZ to CS at SAC. I thought I'd book an additional SAC to EMY on the CZ, and EMY to SAC on the CS, to shorten the layover and get more train time, but a test booking doesn't give me those options. I can do it, but only by changing trains, which I'd rather not do. Any suggestions on avoiding the long and late-in-the-day SAC layover?