Hi dstefan. First, thanks! It was a challenge to figure out how to install a heater in the X1 while still enabling the doors to fully open. I was finally inspired by snow camping hot tents. The stovepipe fitting are all held in place by gravity. To close the X1 top, you first pop off the stovepipe cap on the outside. Then on the inside, you pull up on the double pipe to disengage it from the double flange on top of the stove. Then pull the pipe out through the silicone stove jack and stow. There are springs around the inner pipe to keep it in centered inside the outer pipe. You remove them together. No need for removing one at a time. Takes less than a minute to install or remove.