My memory being like a happily gurgling drain, it's no longer capable of handling this adventure. Toooo many things to remember and to think about.
So I'm employing what might be called the 'Classic Expedition Planning Method'.

Everything that needs to be done or remembered is written on a huge wallboard, all instantly visible without having to turn a page or press a button.
Everything that needs to be taken on voyage is laid out on the floor, all instantly visible without having to rummage through tons of other stuff.

My great idea of having a big box in the hallway and just chucking everything in it that sprung to mind has been a miserable failure.
For instance, I'd realised that I couldn't find the spare handlebar levers - anywhere.
"Are they in the box I wonder?"
After chucking everything out, there they are, right at the bottom!
- Chuck everything back in.
"Hold on, I didn't see the spare spokes in there!"
Chuck everything out again. No, they're not in there.
- Chuck everything back in.
Where are they? Three hours later, there they are, still on the shelf in the garage.
Hopeless!
As Mrs Macbeth said, "Out, damn'd Chuck! out, I say!"

So, here's the new 'Voyage Situation Centre':

The Wall.

and the Cape Town Inventory:

Stuff Required On Voyage.

Right now there are 50 days left to departure, and 79 items pending on The Wall. And the bike's in bits - I'm fitting a new starter clutch. So must get on......