Yes, that's what I meant. If you look into the lua-file, there is a line commented out, that starts with "do_every_draw". Remove the "--" from the beginning of that line, so that you get some info on the lower right. Check the axis value and adjust these lines accordingly:
function getvalue ()
if mixture_axis > 0.55 then SetTo = 0 end
if mixture_axis < 0.55 then SetTo = 1 end
if mixture_axis < 0.45 then SetTo = 2 end
if mixture_axis < 0.09 then SetTo = 3 end
To explain: "SetTo = 0" sets to cut off, 1 to low idle, 2 high idle, 3 flight idle.
Put your axis in the highest position you still want to be "cut off", and replace both instances of 0.55 with it. Find the highest position for low idle, replace 0.45 with it, same for high idle and 0.09.
Obviously, the axis should read 1 at cut off, 0 at the flight idle position. If it's the opposite, just reverse the polarity (j/k, reverse the axis ).
Don't hesitate to ask if you have any furter questions or need other functionality, I'll try my best.
Just one warning: Due to the implementation. Right now, you can not move to high idle (actually the complete right side) if you are in the taxi/reverse range. I don't really need that functionality. If you do need it, I can try to make it possible.