If I'm installing the dish near the top of my roof (roof has 10:12 pitch), and I want the dish on the back side of the roof- so you can't see it from the street in front of the house- my question: Can you get a 1-2 foot extension on the mast arm of the dish (vertical part) so that I can set the dish back far enough from the peak of the roof to not be seen from the street, and yet still be able see sats 110,119,129? (Assuming a dish 1000).