I currently have 2 Dish Network 500 dishes on my roof here in Pennsylvania for locals and HDTV i seriously want to switch to Bell Expressvu's far superior HDTV progamming and totally more diverse Canadian progamming via the 6120 HDTV system from BEV, i used to have Bellexpressu a few years ago so i know how to get programming and euipment. Tech related question, can I repoint one 18' Dish Network 500 with dual LNBF to BEV satellites to receive the two satellites on BEV? is this a simple procedure or do i need to purchase 20" dish with the 6120 system and replace on the esisting tripod?