I have ordered an Osburn 3300 and have not experience newer stoves as i am comibg from an old Defiant. I will be picking up the new stove in the next couple of weeks and will be using 22 guage single wall connector pipe. I have approx 25' of masonry chimney feom the connector pipe to the cap. I have never had an issue with draft and if not careful with the Defiant it could easily run wild is minutes without closing the bypass damper. Thag said, with a newer stove, do folks experience issues with stoves running out of control with only a single air control? I know alot of stoves do no recommend stove pipe key dampers, but would you recommend putting one in during install rather than pulling the connector after the fact. Is tbis an issue i should be concerned about? Thoughts on key damper install "just in case" or am I overthinking it?