Bear in mind that antenna pointing is critical for viewers outside the immediate Springfield metro area (particlarly in the south).
I am in the "immediate Springfield metro area" (just south of the city limits) with an antenna and preamp in the attic, pointed toward Fordland, and I get frequent dropouts in the signal. I rarely watch Fox, but if I did it would be really annoying.
Two crappy network affiliates in Springfield.
A CBS on weak VHF that's unwatchable with lightning in the area.
A FOX that's not receivable in much of the Southern part of the DMA, including all of the Northern Arkansas.
The last update on 11/19 said 2-3 weeks and the Polk tower should be up and operational. It's been over 2 weeks, I hope it gets turned on before Sunday for NFL. I had been getting 49 but lately it's been too weak to even tune in on Media Center. Maybe because it's been storming constantly.