So. As my P slowly (and I mean SLOWLY) returns to roadworthiness, I've begun to wonder about the Vigano hubcap which I was given to put on it. It obviously cannot bolt to the wheel mount bolts, as the cap covers them...
I assume then that what you need to do is mount the wheel rim to the scoot, tighten the wheel mount bolts good, and then on the other side (shock side) you can undo three rim bolts without fear of the rim splitting on you. You wrangle the hubcap on so its three mount points are on the shock side of the wheel at the now nutless rim bolts. Reapply the nuts to the rim and you've got the hubcap on?
And yes, I'm aware that "nutless rim" and "reapply the nuts to the rim" are fantastically disturbing ways to phrase this 8)
Thanks for the help!