I have about five MySQL slaves backing up a MySQL master. The master is rather old and I am planning on migrating to MariaDB. I was hoping I could I create a MariaDB slave that backs up the newest MySQL slave (making it a relay) and then make the Maria slave a master and add Maria slaves until MySQL is phased out. Does this sound like a good plan or would it be better to just create a new Maria Master with dumps and add Maria slaves to it?