Is there any down side to installing an in line damper? I was going to install one on my Jotul Castine, because at times I feel I am getting too much draft. But, the place I bought my stove, the double wall stove pipe and my chimney doesn't sell them because they don't believe in them. I have found it on line for around $35. It seems worth buying to me (an easy install too). Honestly, I think the experts on this forum know a lot more than the "guy at the counter". Your input would be appreciated. Thanks, Slim