i have a smke dragon and would like to purchase a catalytic add on---is anyone familiar with these,,do they work?,where do they mount,,in the stove or pipe?,,and will i actually get a better burn in the stove,,and therefore incresed heat output?--where did you buy it? cost?,, longevity of the product?,,ease of cleaning and time frame between cleans?----sorry for all the questions,,but i know you guys will help me out here...thanks --pat