[timgr]

You should be aware: effectiveness of an attic installation is difficult to predict. There are too many unknowns, in the material of the roof and structure, trees and buildings and other obstructions on the other side of the roof, and conductive and/or noisy wires, pipes, chimneys, etc. that are part of the building. Antennas are designed to function in free air, and you can change their electrical characteristics by placing them in other environments. Some building materials are more transparent to signals than others. Stucco, for example, contains wire mesh typically and is basically opaque to TV signals.

That said, you have a lot of signal in the air, and the attic installation should be ok... as long as there are no obstructions etc. and your building materials are sufficiently radiotransparent.

IMO the DB8e is not overkill for an attic installation, if you have the room to install and aim it... especially since you are unwilling to experiment. Realize the panels area is ca 4' square.

The DB8e is not deaf to VHF, but its also not designed to be sensitive to those wavelengths. VHF wavelengths are longer than UHF, and the long yagi type antenna is the more practical design for them. You are also reducing overall sensitivity of the DB8e by splaying the panels and putting it under your roof. Why not add a dedicated VHF antenna for those channels? Try it, then add a Antennacraft Y5713 or Y10713 if needed.

You want to DX for CIII ... an attic install puts you at a significant handicap. Very unlikely with a single panel from the DB8e. Both panels aimed at 106 and on the roof, probably.