I just ordered the 510. I paid $79, they will ship it to me with UPS 2 day at no additional charge. I will send them back my oldest receiver, which I think is a 2700. I will now pay the $4.98 monthly for the VOD (Video On Demand) access. That's it, the $24.95 is waived since I have auto pay...

I just ordered the 510. I paid $79, they will ship it to me with UPS 2 day at no additional charge. I will send them back my oldest receiver, which I think is a 2700. I will now pay the $4.98 monthly for the VOD (Video On Demand) access. That's it, the $24.95 is waived since I have auto pay...

I was noticing on the back of my DVR-510 that it has an "Expansion Port", I wasn't sure what it could be used for or if anyone else has used it? Any one?