I just did this too, and I never seriously considered doing it myself for several reasons. The first is that our house is 3 1/2 stories tall and getting on the roof is difficult and dangerous. I leave that stuff to professionals. The second is the equipment. I don't have the line testers to sort out the various signals, and the guys that did the job were up there for an hour finding the right lines.
Finally, this was a 6 hour job, and that's way too much time to be worth it for me.
Your experience may vary, though.
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