well seeing the grand island towers is a bad thing in this case. tv fool will tell you wether those grand isalnd towers will interfere with the canadian ones and on top of that if there is some sort of amp involved it will likely play a bigger factor. having a parabolic reflector helps a lot since it makes the antenna highly directional but if you see the towers in the direction of toronto then no help at all. I am acctually surprised you do not requiere notch filters for the near by tower frecuencies which highly speaks of the quality of the blonder tongue pre-amp.