I don't have a Dx18 myself but I did have a quick look at the mixes when I set up a model for a customer recently.

Firstly I wouldn't use expo to offset the position that the mix comes in. Within the mix program there is an offset percentage which if you adjust for elevator down will allow the brakes to come in further down the stick travel of the down elevator.


Also If I'm not wrong on the switch selection in the program mix you should be able to highlight each position to turn the mix on or off for that position. I seem to remember there is a black box that signifies that in that position the mix is active.

I'm sure someone who has a radio in front of them will come in with something more definite.

Regards

Colin