What antenna are you using now?
If I was faced with the weak signal conditions shown in your TV Fool report, I would install a Winegard HD7698P and Antennas Direct PA-18 or CPA-19 preamplifier... outside, high, clear of obstructions.
The path profile for
KSBY and
K16FC indicate there are several high hills blocking your view of the transmitters. An attic installation is going to reduce an already very weak signal.