The time has come for me to reassemble the speeder. Obvs I have left this long enough to ensure I've forgotten how it comes apart and thus goes back together again. But we like a challenge.
Anyway, here are all the bits:
It's got a machined bore to fit the quill of The Shiz and is held on with a pinch bolt. However, as you might expect, the pinch bolt block would foul the body of the speeder in its current form. It's upside down here but you can see that there would be a problem if I flipped it so that the rod pointed down, as would normally do.
So it looks as if I'll need to do some surgery here. It feels to me that I will need to hack off the existing pinch bolt block and fit something more (axially) space-efficient. Doesn't look like the end of the world but needs a bit more buggerage before we are done here.