I'm upgrading an H21 to an H24 from Solid Signal. This will free up a DECA to use for an internet connection. I'm used to seeing 29V used for SWM8 and 21V with a SWiMline dish (my setup). I had not seen the 18V before, but the product picture on the SS site shows it with the familiar green MRV / DECA label. Would I be correct assuming that for an internet connection both the 21V PI and 18V PI will meet requirements? If this is the case I guess the advantage of the 18V PI is just that it is less bulky - also looking at the picture again it looks like it would be harder to mess up the connection. Thank you.