David,
The FF is a great product, and you shouldn't have any issue installing it. Purchase through Walt and you can't go wrong. He's a great resource to have, and he knows this system inside out. Search this forum (for freeflight) and you will find questions I had about the installation, that Walt promptly answered. You will be in good hands.
(Hey, we've both gone the extreme with the E6, and come back full circle to the tried-and-true -- believe me, the FF is a piece of cake compared to that experience!)
Michael