The Zed's O/S/R tyre is going in for a look at a puncture repair tomorrow. If the puncture is where I think it is, then it's in the main body of the tread, which is ok as far as repairs go. And the tyre hasn't been run far enough to get hot while going down, which is also good. So the wheel came off this evening. Again.
I also tightened up the little bolts on the CG-Lock, and the little rubber strip that runs along the edge of the slider appears to have run away. Again. I must have stuck it back on several times over the last few years, but this is the first time it's disappeared. I'll have a look for it tomorrow in better light, as it can't have gone far, but I did put my hand down the sides of the driver's seat and couldn't feel anything . . ?