about a year ago i left dish network to go to comcast cable.....big mistake. i want to go back and want to add two more receivers in the process. My old system was a dish 500 with a 301 and 2800 receivers with gold cards(?) i beleive. they were working when i disconnected them. I purchased them about 12 years ago and own them outright. if i hook these up again and add two more 311 type used receivers should everything work? when i renew my dish subscription of course.