Parent and Child Mixes

[pip]

I just finished a tour with Bombay Bicycle Club where i had 7 sub mixes and a large mix window behind. If the projector got nudged, i had to move each mix independently. Could there be a function to assign a mix (In my case mix 1) as the parent and then assign child mixes (mix 2-8) to follow its the top and left positions?

Hope this makes sense!