Set Raven as (center) Main screen

Hello,

I read that the far Left Raven has to be set as the main screen... but...

I want to setup 2 MTi2 together with a 27" third party (non touch) screen, using the Non touch only to display metering plugins (on the far right).

But I would really like to set my center screen (Raven) as the Main screen... so I am at the exact center of my setup.

Is there a way to set it up like this? or is it really necessary to set the fare left Raven as the Main (for any special reason)?

Thanks in advance.