I kind of had the same question. I put up an extra 18" dish in my backyard and purchased a Satworks 3618 receiver as well as a satellite aiming device. It is pretty neat to tinker with it, but there really are very few stations that one can get with an old 18" directv dish. Now, if I want to upgrade to a 30" dish would I need to purchase a new LNB or will the old directv LNB still work? Can someone recommend an inexpensive dish to purchase as well as an LNB for my 3618? Thanks for the help.