I can attest to what Scott said (about using all 3 devises) on my previous stove. It did perform W/O the MPD and Baro, but after those installations, and monitoring all the stoves functions, and adjusting accordingly, I got it to perform to the best of it's capabilities. Of course the considerable advice obtained, by the patient and knowledgeable members on this site, provided me with the ammunition to achieve the quickest and most effective results I could've imagined. I can guarantee you'll be happy with the information you'll acquire from these people, and will have a totally enjoyable winter with your new stove. Now, while you're waiting for parts, start practicing your picture posting, cause some of us thrive on pictures of other members installations. Looking fwd to your progress.