ok here's the deal ... i am an installer, installing a slimline vs. and old KaKu dish is cake. whether you have a standard 100 dollar sat. meter or a bird dog (expensive, unless you install). don't expect to get an HD picture if you're trying to shoot in your dish with the beep from the receiver, not gonna happen. Installing on a SD receiver will work just fine, but again, don't expect to get an HD picture later. Also, mount must be sturdy and level (not close, level !) you'll notice on the back of the dish mount there are dials, these are for fine tuning so you can pick up your other HD's 99, 101w, 103 . . . if you can't fine tune your HD will suffer. Ok, diplexers work great if you're not using HD or HD Locals, when you use a diplexer you limit the ammount of power your receiver is sending to specific LNB's, when this happens you lose transponders ( when you pull up signal meter on receiver you get a grid of numbers that show your signal, each of these is a transponder, if you lose one, you lose channels). So NO diplexers with slim line or other KaKu, run a separate line to your off-air.