This is where you can get creative. I think a BBM cam gear has 50 teeth? If so, that's 7.2 deg/tooth. So you can play the games of moving the chain 1 tooth in either direction in combination with using the different key slots. I've done that many times to get it "where I want it." You clearly know how to degree the cam so go experiment and see what you can come up with. You can do this!