Update PLUS?

Plus what? You may well ask.
Plus a badly timed experiment.
The update - "The potato chit challenge".  The Leaf mould seems to be spurting ahead; plus it's holding hydration better.
REALLY close inspection shows the "Bulb compost" one is just in sight, (To ME)
The experiment - BADLY timed - ought to have started on the 1st of the month for ease - BUT - since the leaf just dropped off today, I'll make it today.
Just to see how long a crassula leaf takes to become a plant in its own right.