By the way, speaking of Costco, I was intrigued to see that they now sell the Caroma Sydney 270, which uses an offset flange adapter to fit either 10" or 12" rough-ins. More importantly, they claim it has a FOUR INCH trapway. Can that be right? Wouldn't that be a challenge (or at least a little misleading) given how many people have 3" closet bends?