I'm in the process of planning a WHDVR upgrade and will probably need a SWM8 (to get the legacy ports for my SD Tivo). How far can the SWM8 be from dish? I've seen 40' on the web, but is that a hard limit or just a suggestion? My current 6x8 multi-switch is about 80' from the dish. I'd like to put the SWM8 in place of the 6x8.