I am getting ready to install a soiree. But upon closer inspection, I notice that the flange adapter is rather narrow.. approx 2 1/2 inch diameter. Let me cut to the chase. I am a very big guy and purchased this toilet thinking I won't have to keep a plunger close by the rest of my life. I am having my doubts about this toilet and don't want to install it because I am unsure of how it will perform. I would rather have the most powerful flushing a home toilet can provide. I am also very tall and chose the soiree bc of its tall seating height. Anything you can tell me about this soiree's ability?