So in summary, the questions you want to ask are how big can this be, how much of it can we get, what's the growth rate of the market, is the market itself declining or is it in flux or is it taking off? and most importantly here is talk to customers and the sales channel, and next important is you can get some pretty good market size estimates by competitive approximation if it's an existing or resegmented market, or even if we're going to clone a market outside the US.