Andyroo, the paper by Martin Woolley is best I've seen so far. Oddly sanitized of contact info but see the interWebs are littered with his videos. Now to see if this guy is правда or MoPoo.
this is Piffy-the-cat about to make a poo and/or pee event. Many times she will look into the motion video cam above so as to reinforce my belief that she is a shape-shifting extraterrestrial rathar than an actual cat. My other lab assistant _NEVER_ looks skyward, quite odd.
integration on 2nd weighting platform has begun to connect a Teensy3.2 to rpi-zero-W. (before was arduino UNO to old rpi-B). Teensy was selected to have processing bandwidth (and DSP) to have growth potential to use audio to qualify if tray event is a pee or a poo (comedy potential of that feature is ginormous)