Nube here. I have 2 dish 322 rcvrs i bought from a friend in Fl, and need to know which lnbf to use. I have an old (10 yrs old) 18in dish with the rectangular lnb arm but noticed new lnbs are oval shaped. I also have 2 dish 301 rcvrs I will install in a rental next door sometime next year. Can I connect all 4 rcvrs to one lnb or do they have to be separate dishes. Right now all I want is the lnb for my 2 322 rcvrs. Can I change the lnb arm or get an adapter to fit the newer oval style lnbs. Thanks for your help.