[ul]
[li]Scenes are the answer for that, imo. [/li]
[/ul]
Scene 1: looping with Flex machines (track 8 as master)
Scene 2: looping with Pick Up Machines (tracks 1-6 are Pick Up Machines, track 7 is a Flex Recorder and track 8 as master or course!)
Just an example! That’s how looks my main template 
I love you, Octatrack 