i believe that would make the EGO correct by adding or subtracting a full 10% of your VE value for a particular cell. that's a pretty course adjustment and unlikely to yield the correct ratio you need

Because if your LC1 takes a shit tomorrow its going to completely rape your AFR.

When your KPA value passes over a certain point, I think 60 by default, megatune will use the values in your VE Table to feed fuel. When below 60, the autotune will use values from your AFR Targets table to slightly manipulate the values in your VE Table to achieve the given AFR. You can also specify when it engages the ego correction based on rpm. Good for not having it mess around with idle.

But in the end you should rely on autotune and ego correction for proper tuning, you have your AFR dead on with the VE table and then let it pull it up or down a bit on its own.

Btw, read the mega manual very carefully, and then read it again. I read it cover to cover at least 3 times already and it took me a full month to really learn how megatune and the megasquirt works.

more settings, open loop, then set the kPa where you want to go open loop.