So I was recently gifted a MARES 12 DFC 1st stage in what appears to be very good shape. I will of course get it looked at and serviced if needed before use but being new to the sport and the overwhelming equipment options Im just not sure about it. I guess my real question is, is this a good start to an entry level rig set up? Also, does the 2nd stag and Octo have to be matching brand? Lastly, what exactly is DFC? It has a specific DFC port. Thanks for any info.