Too economical as it turned out. Over the course of a week or more, the pump became slower and slower to turn on after a flush, and the toilet developed a disturbing 'belch-back' behavior. Sure enough, it eventually backed up. Not in the long skinny line from the pump to the bin, but in the short wide pipe from the toilet to the pump.
Pigpen was annoyed. His diagnosis is that more flush water is needed in Number Two Situations. This in turn makes his planned overflow-processing plant bed mission-critical, instead of being just a nice-to-have accessory. That is to say, there may not be a window of operation between enough water to flush and too much water for the compost bin, or if there is, it is very small and will require an experienced touch on the pedal, like the touch the Skipper needed to start his 20-year old diesel, you know, before it threw a rod and became a yard ornament. I digress, but that's the end of my little story 4now.
Here's another news-of-the-future link for all you sustainnibals: