Just a 'heads up'. As I will be developing my windstop prototype soon, I'll be ordering some more perspex. This means that the postage cost can be partially absorbed. So in approximately twelve days (11th/12th November) I will be ordering another windstop with more accurate dimensions gleaned from my first effort, plus a red spare wheel filler for Lightsphere.
If anyone else is interested in the spare wheel filler, please PM me. If you have a Roadster, I have the dimensions - the centre hub is 160mm, total diameter 360mm.
For any other wheel I will need those two dimensions measuring accurately. I fully expect that most centres will be 160mm.
So there you have it.