Logic 11 Bus Faders & Arturia KeyLab Essential 61 MK3

Arturia KeyLab Essential 61 MK3
Logic Pro v11

I am considering purchasing a Arturia KeyLab Essential 61 MK3, but I cannot find if the Faders can be assigned to a BUS for mixing purposes. I see fader 9 is the master.

Followup question, Mark III faders default to tracks 1-8 so I assume you can re-assign them to other tracks?