more than 2 Mackie extendere

[Armando Rivera26]

Yes I got that but I want to add a second master controller, is that possible?

Try Changing the value on the "Extender value", but I'm not sure if that will work. One thing that I experienced, Every time a changed the master position my loop midi crashed, even closing the program didn't help, so I had to reset the pc every time it happened. 
Anyway Best of luck.