Are all LS400 modules created equal? I would like to put an LS400 module in my linkbox HD Local (I heard they work better than my current LS500). I see on e-bay they are selling LS400’s. Some sellers say that it fits “Limesat HD Air Receiver” and other sellers say it fits “limesat pinwheel linkbox8000 dream link”. My question is are they all the LS400’s interchangable or are they made for individual units? thx