With the stove working daily for almost two months now, it was obvious the flue was becoming obstructed with creosote deposits. When it got to the stage of smoking the yurt out every time we opened the stove door to add more wood, it was time to do something about it.
I also wanted to make a slight modification to my earlier modifications. (The upside-down flue pipe has been working perfectly. No leakage of creosote or smoke.)