Chris, Thanks for answering my question...My reason for asking it was that I keep seeing presentations and offers for us to use these tools, and don't quite know which way to go... Now I have two more questions for you...1) Does the arithmetic work for you, investment vs return? 2) In the marketplace, are you disclosing more info than the reelturds want you to? Do you find lots of insulation gaps in older homes? Does that turn people off? Bottom line, have you become the hero or the villain by using IR?