Here is a question for all. I have a 722k with a sling adapter installed on the rear USB and a WiFi broadband stick on the front USB. I would like to add an external hard drive to the receiver, but the two USB ports are in use. Can I use a USB hub with the sling adapter, external hard drive and WiFi stick? I could just try it, but I wanted to see if anyone else has already tried doing that or maybe someone is currently setup this way.