You might be right. Everyone I have talked to has said that they are compatible. This link has a puzzling statement though
http://www.sadoun.com/Sat/Products/Dishnetwork/Dishes/Dish-1000point2.htm
"While Legacy receivers are supported without a DISH Pro Adapter, at least one DISH Pro or DISH Pro Plus receiver must be connected and powered at all times to power the LNBF."
The dish pro adapter however says that:
http://www.prosat.com/catalog/item/1824246/1253115.htm
"The DISHPro Adapter is required for all DISH Network Receivers; 1000, 2000, 2700, 2800, 3000, 3700, 3800, 3900, 4000, 4700, 4900, 5000, 6000, 7100, 7200 and DVHS when used in conjunction with DISHPro LNBFs.
Models 301, 501, 508 and 721 DO NOT require the DISHPro Adapter"
I guess my question is has anyone run a 1000.2 with ONLY legacy receivers, specifically the 508?