I find an easy way to visualize where the reflection strength is strong or weak is to disconnect the Reflect node, and connect the Reflection_Value math stuff to the Alternate_Diffuse, and render. With that setup, you can directly see where the Reflection_Value is strong or weak (white or black). This makes it easier to see what you're doing when you adjust the math parameters. Then when you're happy with position and falloff, you disconnect Alt_Diffuse, and re-connect the Reflect node to Reflection_Color.
Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)