I have a dish1000 dish installed on my roof that is not in use. I want to instead put on a fortec 80cm dish up there and get IA5. Could I just take off the dish1000 and replace it with the fortec one. Will it fit? I did a similar install where I took off the DTV 3 lnb dish and just attached the fortec 80cm to the mast and is working fine. Anyone been able to do that? I don't want to do another install if I don't have to. Everything there is already in place just need to swap out the dishes.