This has so far confirmed what I suspected: my Class C, which has a tank with a "well" (think of a capital "L" - then flip it 90-degrees to the right), thoughtfully positioned with the well under the toilet - is a BRILLIANT design! As the water flows over the "waterfall" - the turbulence scours the well. Dumps spotlessly every time (I've looked). Give me 2 minutes at the dump station and I'm outta there!
Our beloved 5er, however.... has a big flat tank. And is going to require rinsing :-(
Looking forward to more "Black Tank Education"!!!
