Just installed the Toto Drake CST 744 SL. On my first "flush" under real conditions (I think you know what I mean) the toilet plugged up and I had to use the plunger. The primary reason I bought this toilet was because of its reputation for a superior flush. Today, I learned from one of your readers that this toilet has a "variable" flush, one for liquid and the other for solid waste. (I obviously used the liquid flush, thus the clog) How interesting ! As this is not mentioned in the instruction manual at all. What a difference between the two ! Have not had a chance to test it out again but I am sure the results will be much improved.