Thanks joecar for the explanation.
If I want to trim fuel to compensate for meth injection I will have to do it in the {B3647} commanded fuel table or make it leaner than the {B3618}.
PS: You have a typo in the "B3618 operating cell (EQ 1.699)." It should be (EQ 1.1699). I know picky picky but don't want to confuse anyone. Like me...LOL