ORIGINAL: wings19
Is it possible to put the mix on a switch so i can turn the mix on when i knife edge and turn it off otherwise?
Yep, that's how I do it. Just assign a mix to a switch that's convenient for KE flight and turn it off when you don't need it.
Even if you plan to leave a mix on full time it's a good idea to first assign it to a switch so you can turn it off if you need to.