I've got new replacement G450 MG's online and registered, with the idea of retiring my G650's shortly. I'm moving services over slowly and the sync source came to mind. There's no s8300 in these as they will just be controlled by duplex and/or an ESS. Do I need to set the sync source for 1 of the DS1 boards? Wasn't sure if that's a carrier requirement or should be mandatory setup in the MG.